Wil....i was going your route (gt35)....BUT the maximum you can run on pump fuel will be around 550bhp...so i looked at my comp ratio and bought what i thought was the best turbo for the situation...the T4.As its only a road car i wanted power/reliability/drivability.....Although the GT35 would bring the same kinda results as the T4 it is more unreliable,needs much more attension,plus is a right arse to fit and more expensive plus have the ability for xtra bhp i just cant use.
IF however you plan to use race fuel then GT35 that ass