what do u use the box for, mainly?
what app(s) used most?
use for playback and what type of files u play?
what audio quality u need?

since u mentioned 2 china apps, i assume u know where to get such apps and how to get them to work.

i suggest u get moli, cibn, mango - all the good china stuff!

i also assume u know where to get n how to install firmware updates, app updates, etc.

and yes, they all work very well with q5pro or q10pro.

kodi hk drama... r u referring to icdrama?

u can continue to use it smoothly or u can use icdrama rss reader app - i find this better - faster, easier to navigate.

online streams typically do not hv great audio, but if u do playback, q5pro can give u the best audio and video output - bluray, 4k, 10 bit, hevc, hdr, dtshdma, dtsx, ddtruehd, ddatmos... if u do not playback such files, the feature is "wasted".

in short, yes, q5pro will be good for your needs.

q10pro is the big brother of q5pro - has more storage space and an internal HDD slot; else, the same.

q5pro with less storage is not a problem unless u install a hundreds apps or so.

My used Q5 is on sale at LYN's "Garage Sale" section for a good price