honestly the T/B is one of the last things people due in the serch for a few more KW but basicly yes the exhaust becomes the limiting factor if the intake is of an apropriate size and has no restrictions. the T/B you select idealy will have the same bore as the entry to the intake manifold, in your case i think the accord is like 64mm-66mm (anyone confirm?). but honestly theres alot more power to be found changing the exhaust then the throttle body, honestly i doubt its worth changine it unless your also working/changing the intake manifold