^^^are you serious? K20's, although great, are very very expensive. Twin turbo? :doh2: I'm not even gonna start...
To the OP, it sounds like right now you just want some more power than stock. I would suggest a B16 or a GSR swap. The GSR is a little more but will be a better dd because of the low end torque. If your feeling really ambitious you can check out an H22 swap, you will have to do more modifying and get custom length axles. Either way you are most likely going to have to convert to OBD1. Each swap is a little different, do some research and figure out what you want to do. Oh and by the way, you don't live in cali do you?