Studio Monitors or the Swan computer speakers are really the only way to go. I looked at everything before I made my speaker choice last Summer (including computer speakers, studio monitors and home audio). I ended up buying some Fostex PM 0.5s for $135 used on ebay. Best speakers I have ever owned, its only competition came from the same class of speakers.
So look at the M-Audio bX5a, KRKs, Samsons, Mackies, etc. before you buy, you won't be disappointed.