coming from someone who has had alot of experience with ghetto hacked and improperly swapped cars, leave your car the way it is, save the $200 at a time you were going to spend on mods and wait until you have enough money to get a k-series or type-R swap.
if it becomes too difficult to wait until you can do it right, then you ( or I )have no business driving or owning a modified car, honda or otherwise.
it's a very hard lesson to come to grips with believe me.
You don't really need a K series or a type-R swap. If you're just looking for a slight increase in a power a B18b or B18c1 or a B16 would be just fine.