But going back on topic, from nearly years worth of research keeping the 1gfe na and gaining decent power will you most expensive option. swapping for r200 engine is probably more efficient than tuning the 1g in my opinion, some will say "just get a is300" is300 average around 3 to 6k still! picked my is200 up for 550,
Forced induction is the best way of getting your money's worth.
Me personally if I had 2 to 3 k spare, I'd either go with the r200 swap or turbo /supercharge my block. or buy a mk6 type r or mk7 accord type s but then loose rwd