How can I pick a better engine for my 2000 civic ex?

just because his car has more displacement does not mean he will be faster than you. you can still blow his doors off. the K20A is more efficient and weighs less so i'm sure your car will be fast. remember ur civic weighs less than that prelude as well. stick with what you got. the aftermarket support for the K20A is huge. i know you will find something that is made for ur car. it's to easy to make that thing a beast..think about it.