Visiontek Radeon 9100 128MB from CompUSA: $100 - $20 MIR until Saturday. IMO, this is the current best buy. I can't say that with absolute authority, though, as I haven't yet seen an FX5200 using the Det44.03's compared to a 9100 (or 9000P, which is slightly slower than the 9100).
I myself am probably going to get the 9100, because I'm not sure the 5200 will be faster in the settings I envision using (10x7, AF), and I don't think I'll find a review or numbers to prove otherwise by Saturday. That and the 9100 will probably have better 2D quality.
Edit: Hrm, looking back,
this TR article did in fact compare an FX5200 to a 9000P, and the FX looks to be slightly superior. This complicates my position, as I know the 9100 is faster than a 9000P, but I don't think it's fast enough to overcome the FX5200's newfound speed. The FX5200 is now more tempting, as the thought of being able to use both AA and AF at 10x7 in some games is very appealing. Decisions, decisions.