K20 dude well in fact the H22 or H23 have more potential but duddde K20s are chill as **** but depending on your bufget you wont probably be able to spend the bucks for a complete K20A engine with the RSX turbo because if you look for example at GReddy products you gotta find 3K$ for the turbo.. .you do not have an intercooler yet

So I would say that if you are planning a swap go with the LUDE NON-SH engine dont know the code by heart (H22 ?)

Whats your car so?
Whats your budget

you also got to pay for the engine mount kit lol get a B16A that has a stock 160 hp and add 20psi to it if thats not enough add nos and make your engine boom..