Of course, forums as this tend to be more reliable and truthful than many if not all SAs out there. It's the age of the savvy internet users.. Do research first before purchase..

With most electronics, especially TVs.. Prices usually come down as newer specs are released. Tis the way.. So buy yours only when it's needed..Else if you can wait? then wait lor.. The worst that will happen is that a particularly solid model will go out of production and stock... Which means, you missed the boat and or will be forced to buy at higher pricing from sellers who take advantage.. This happened with a particular Samsung series 7 model few years back..

Important advice: once purchased, don't go looking for it's new price cuz you'll hurt.. I know from experience.. So always buy the best TV within your budget. This way, even if the price drops and or better stuffs come along later, you won't regret purchasing cuz you already have what you regard as the best screen.

How far are u sitting from the TV?

60" has uv2a panel 

can't tell u the specifics of the panel but u can compare the 2 side by side for other features:
https://my.sharp/compare/product
small price diff, i think.
6800x has been in the shops since early 2018, i think.
yes, prices have come down as they always do.
current... this 50" is the cheapest i hv noticed:
https://www.lazada.com.my/products/sharp-50...JziOPJ&search=1

new model may not be coming so soon becos 6800x is <1 yr old, just got android8.0.
besides, older 630x still selling, not removed yet.. so, i dun expect new model for 2019.
will price go down further... who knows...?

at that distance, if u play 1080, 2160 videos mostly, can go for 60".

if mainly 360, 480, 576 or 720, u may find yr eyes stressed with 60", may be better off with 50".

more so if u r coming from 32, 40 or 42".

astro and unifitv HD channels are 1080i; netflix HD is highly compressed - these are ok.

SD channels, bad!

however, if u playback full 1080p/2160p videos, 60" delivers very nice picture.

i think it is all about the size of the screen that need more pixels to produce sharp, rich color picture.

simply can't get good picture with low grade videos unless on small/very small screen.

hence, my repeated calls for 50" or lower if u r not watching high resolution stuff.

4k broadcast by IPTVs will be answer to large TV's - sky, bein and many others already doing since a few years ago; astro just introducing...

Right... hd also many kinds.. some so called hd channels are actually 576, not even 720.

No fun watching low grade videos on 60in.
I made those comments after my own exp.

I had a 50in at 9ft, then replaced by 60in... had to move couch to 10ft.

The 50in moved to another place, now watching at 8ft.

Took me a few weeks to get used to the 60in for regular tv; no problem with blurays 1080p, 2160p.

there is 240, 360, 480, 540, 576... then 720, 1080.

i refuse to watch anything below 576.

6500x is a lower specs tv, discussed many times here too.

u can compare on this site and see the diff:
https://my.sharp/compare/product

main diff... it is not androidtv - it has a browser, youtube but no netflix, voice search and cannot sideload apps.

1 usb port, 2 hdmi only vs 2 and 4 in 6800x.

if u want netflix for such a tv, best buy a separate androidbox that can do netlfix uhd e.g. mibox.

that will also eliminate the need for chromecast dongle which is less versatile, less useful... and cost money too.
really, if u are going to spend more on other equipment, might as well go for 6800x and enjoy all the features incl built in chromecast.

some people will tell u non-androdtv + android box is better than just androidtv tv.

my answer is yes ad no, depends on what u want and what u do with it.

a lot has to do with your personal knowledge and attitude on how to make android apps work.

and typically, the best features, hardware, firmware and support are found in higher priced 4k hdr models.

6500x is a lower specs tv, discussed many times here too.

u can compare on this site and see the diff:
https://my.sharp/compare/product

main diff... it is not androidtv - it has a browser, youtube but no netflix, voice search and cannot sideload apps.

1 usb port, 2 hdmi only vs 2 and 4 in 6800x.

if u want netflix for such a tv, best buy a separate androidbox that can do netlfix uhd e.g. mibox.

that will also eliminate the need for chromecast dongle which is less versatile, less useful... and cost money too.
really, if u are going to spend more on other equipment, might as well go for 6800x and enjoy all the features incl built in chromecast.

some people will tell u non-androdtv + android box is better than just androidtv tv.

my answer is yes ad no, depends on what u want and what u do with it.

a lot has to do with your personal knowledge and attitude on how to make android apps work.

and typically, the best features, hardware, firmware and support are found in higher priced 4k hdr models.

If the right mibox model, yes, can do netflix uhd.

Home mini... speakers? No idea for those...