Quick look at
http://www.ati.com under
product comparisons shows how bad the Radeon X1600 series really is these days. (and it only just came out, so it will be cause a major customer backlash to ATI, just like Conroe might cause AMD to lose 70% of their 'new' customers).
When ATI forced that Catalyst Control Centre shit on me and x64 drivers that lack VPU Recovery I've been looking for a way out ever since.
No VPU Recovery under x64 OS (still) = Bad Idea (as x64 OS are going to take off very soon, they already have in some respects)
Off Subject Reply:
I am trying to double 3D video performance of it now, using a single card, which is easy enough. GeForce 7900 GTX (XFX #1 or #2 model), or Radeon X1900 XT/XTX.
Last 6 cards have been ATI, and their drivers shit me (running x64), so thinking of moving back to nVidia now that their FSAA performance has improved significantly.
Finding such cards in Australia is difficult, even with 'guaranteeing fee's [read: bribes]

, Give it some time and they'll be more available I think.