id go b18 swap or like he said if you got lots of money go k series but you will b 1 of the 1st ppl with it if not the 1st so if you plan on doing it yourself and dont have much honda experience then go b18 but if your gunna have it done then go k series and you'll blow away just about anything on the road.....my personal advice is take it to lht have them swap in a stock k series then u do all the building on the motor because 1nce its swapped its easy to build it your self....