engine swap

I have a 96' impreza with a 1.8L and was wondering what types of engines I could put in it.
Thanks.

The FAQ may be of assistance here...

I heard this place is good, $8k for a swap (STi) done in 1 week, engine included... http://www.garagetuning.com/

Here is more info on those swaps: http://www.rs25.com/forums/showthread.php?t=22095&page=1&pp=15