yeah biostar are fairly good, another option is the (god forbid) mac mini. I am no fan of macintosh but its just another idea. Personally i wouldnt get one because of thier not so good gpu but they are decently priced. Otehrwise i would get a Socket A system and put a athlon xp 2800+ in it.
Core 2 Duo E6400, DFI Infinity 975X/G, 2x 512mb DDR2 667mhz, Albatron 7900gt, WD 200gb SATA, Samsung DVD-RW, Silverstone ST-50EF 500w PSU.