video card recommendations

[Endymion]

Hey all,

I currently have an Aopen geforce fx 5700LE and i recently discovered it 
to be the culprit of serious system instabilities as well as not being 
able to handle any opengl applications.  It works fine under windows, 
but not linux.  So i need a replacement now and i was wondering what 
cards other people on the list have (and that are running stablely!).  
I'm very partial to nvidia cards and especially the twinview feature, 
which is a necessity for me.

Any recommendations would be greatly appreciated! Thanks,
-Endy