Three options, IMO. B-series (bolt-in, good for beginners, where I'm starting), Mini-me (Head swap on your existing DX block) (Second thought, is the 5th gen DX a 1.6 or a 1.5?), or use the search button in the upper right corner of the screen and read a LOT of threads about swaps.

You've got a great platform to work from with that car. Good luck. Check out the hybrid forum too.