If you don't go with Intel for the graphics then the 9500GT is probably the
card you'll want to get. Its performance is a bit better than the current
generation Intels.
The wireless card you will want to get will have an Atheros chipset. AR9285
work well.
25% of the profits go to Trisquel if you get hardware from:
libre.thinkenguin.com
Everything is free software friendly and should work out of the box with
recent Trisquel releases. The only exception is the new USB N adapters. These
will work with the next release of Trisquel. Until then you'll need to
install jxself's kernel and download a free software firmware component. Both
are under free software licenses.