Shim,
If you buy cheap speakers now you will end up replacing them later. I used a pair of M-Audio BX5a speakers - even on gigs at first. They are great sounding and ran about $300.00 for the pair at Guitar Center. Like a previous poster said - there are others - best for you to go listen to them in the store first.

I have a set of Klipsch and a set of Bose speakers that are actually meant for computers and it was a surprise how good they sounded with my Yamaha keyboards. They were both under $200.00. I ended up not using them very much after I got the M-Audios.

Good luck with your search.

Hammer