Where got limit le? now not yet later only but even if they limit it wont be 60gb anymore it might be higher but i dont care coz I'm immune to it, wakakaka....

Let say if you're torrenting, and seeding the file you've just finished downloading, the slow upload will hamper your surfing speed. Making it laggy. But if you know how to set your connections, then you can throw the problems out.

But othet than that, no real worries.
Nowadays, upload is getting more future-proof. So I think it's better to have higher uploading speed and lower pings.

I'm planning to upgrade from 1MB to 4MB

so tell me, right now I'm paying for house line + tmbill of rm88.

by upgrading to 4MB, does this mean ill no longer be paying house line fixed monthly charges or something?

trying to do some math here.

i prefer bbuster deal then unifi.

for unifi = limited. after reach 120gb then ur net will be super slow.
bbuster deal nvr fails me, dl more than 100 full HD movies torrent.
still stable untill now. cheers~

Did TM already taken off the cap limits?
If not, it's a no brainer decision, Unifi is still the best bet if you plan to get 4Mbps ADSL.  Pings are far lower and interruptions are less.
Fiber Optics is the future. With copper, attenuations and margins will be their main drawbacks, if the values are not right, then you might not get your 4Mbps or even 2Mbps. Even if you do, there's a bit possibility your experience won't be smooth. 

Also, not to forget, with 5Mbps Unifi, you might be capped until 10Mbps. So don't be surprised if your download speed can reach up to 1MB/sec.
As for 4Mbps, 6Mbps is the most you can get (If lucky)
Yeah. If you really wanted to get it now. 4Mbps is a good choice. All you need to know now is your copper line connection.
You can post your SNR margin & attenuations here to see if you're line is suitable for 4Mbps.