I could be wrong here, since I don't have the p/review in front of me, but, a site out there did take a look at SiS's new standalone cards. Yes, they were somewhere between MX200 & MX400 in performance, (I would argue any new new card needs at least that much power - if you can't manage to get that much performance forget about producing video chipsets) BUT, the way they acheive that speed is to downsample and blur textures to hell and back again (less bandwidth required per frame rendered).
Hardly an acceptable roadway to performance IMHO, though YMMV.
Greg