Would a gt30 be a good turbo for my spec?

Standard head
Bd14 inlet cam
6 long studded 200 block
Cosworth racing pistons
Greys
500 cooler
Grp a breather

I used to run a .48 housing with greens but when I had Bluesprint rebuild the engine I had greys and .63 fitted then mapped to run 2.1bar. I love the extra power I get at top end but the extra lag is beginning to annoy me if a gt30 is suitable for my spec would it come on boost much earlier than the t34.63? If its not suitable what would be a good turbo for me and rough cost of unit including extras I'd need to fit it


Thanks Billy