i would say go with the b16a, when i got mine swapped in it made world of difference. as for deciding between the h22 or the b16, i'd suggest the b16. it doesn't weigh as much and you don't have to sacraifice power steering and a/c unless you don't mind having comfort. plus a built up b16 is just as good as quick as an h22...i'm runnin a hondata stage 2 ecu that comes with a 9000 redline, with that you'd whooop on a lot of cars. just my opinion