Hi,
You can't go wrong with a TA22!!!!!
I think they are the best looking Celica made! There are a few things you should consider however.
1. If you want to keep it standard, a TA22 is the go
2. If you intend on shoving in a more powerful engine, perhaps an RA23 might be better. It has more engine options (ease of installation), plus there is information in the tech section on putting on cost effective brakes.
3. You can still put 2TG's, 3TG's, 4AGE's of all varieties in a TA22 with ease. Just the engine bay is just a bit short to fit the inline Toyota 6's (It can be done though). Check the engine installation guide.
I hope this goes some way to helping you???!!!