well me personally, i owned a GT, and i traded it in on a GTP. i LOVE the difference. like, the GT i felt like had to work as a DD. the GTP is much quicker and feels like it just tackles DD like a breeze.

plus, you can make MORE boost with teh mods. GTs are limited in that field.

most will recommend top swap for more compression, im lazy and dont like scrapping for parts, so i opted for newer cleaner better car

good luck!