Can't decide what size throttle body to buy. Looking to get the most usefull power out of the engine. I don't mind a little throttle lag but not enough that my low end tq will suffer.Any advice or personal experience would me greatly appriciated.

ENGINE

B18A block
81.25 pr3 pistons
ls rods/ ARP bolts
b16 head/ basic rebuild
Omni power valve train
3in intake with blox v stack
performer X manifold
Hondata IM gasket
AEM fuel reg.
narrow replica header
2.50 mandrel piping /magnaflow cat/ 08 civic HPF muffler