They get the job done...if you do any gaming at all then get the SiS315...it's pretty cheap, but a bit slower than a GF2MX200.
The 315 I've heard also has good video quality, I think it uses a 375mhz RAMDAC which should give some decent 2d quality.
ATI's Xpert2000 isn't bad for 2d stuff, I use those alot at work and think they have great desktop image quality.
I've got an old SiS305 at home which I gave to my parents, it's not a great gaming card but it gets the job done on the desktop.
The ECS SiS315 even has TV out for like 35 bucks, its not a bad deal...
Mike