Get the 1 which is not modded or still in original form.
Original Sti is still easy to drive for majority of people unless you only know to drive Automatic only.
The previous Levorg also got 2.0T engine option which is the same as WRX, if you want worth the money pay better to get the Levorg than the WRX sedan.

Ts did you make your mind?
I was considering wrx too, not sure the maintainance cost..
So far what I read is try to avoid 2015 and 2016..2017 and above.. The newer the better.
But I see a 5 years wrx still maintaining it price well.. Another car u could consider is 86 if no space concern.. But wrx more power..

Can't really read much review or information for wrx in msia.. Most review from Australia, north America maybe due to snow... Not sure where all the owner hide or basically it's not popular in msia.. Seldom saw on the road as well

There is a few popular one in kv..

You should try asking people in related fb group or search in google.
A lot of time in fb group can find the answer or mechanic recommendation.

Then best to skip

Unless this is your second or even third car, and decent amount of cash/FD savings in the bank. (Not as bad as conti, but it's not your average Toyota Honda Japanese)