Since you don't live in Northamerica, it'll be better if you modify your engine.
IMO, doing a 3SGTE swap is more time consuming and need fair amount of funds.
2ZZGE, don't bother with cuz the VVTL-I isn't that great at all. (dunno if it'll fit anyways)
depanding on what the car is used for, Track, drag etc etc, set up on your engine makes a difference.
if it was Track use, i would get Cam, high comp piston, stand alone ECU.
for drag, you can try boosting it, but most likely with low boost. or just try and put GZE.... Blacktop is one unique engine, but it has weaker internals, so i wouldn't really recommand boosting it.
blacktop keep it n/a