????What are good swaps for the Crx??????

hey guys, I want to buy a Crx, not any speciffically yet, but I am looking to buy one though. I would like to know, if I buy a CRX (si, dx, hf) any of those, what would be a good motor swap for each of them, to make it a fast car and not take a HUGE amount of work to do so, but also I dont want to spend more than $3000 but price doesnt matter, i just want to get the info, and which swap will not make me doa lot of modifications to the car. basically, what are some swaps that I can do that will fit these cars and What else would I have to do to the car besides bolting on the engine???? when you will say the names like "b16a1" or something, can you please tell me what car and model that motor is from and how much horsepower I will get from the swap, because Im a begginer in this stuff. Can I do the engine swap myself or do I have to go to a mechanic?? where can I learn how to swap an engine???

also what are some 0-60 times on 88-91 crx's (si, dx, hf)

Thanks a lot.

S E A R C H. Its been asked at least a million times.