I bought a 9600Pro a few weeks back, so the HL2 situation didn't have much influence on my decision.
However, unlike some, I've never been really impressed with Nvidia's vidcards. It's partially due to my AMDism, that being that the choice of TNT/2 vs VoodooX on the K6-2 was pretty much a no-brainer, VoodooX all the way. After the Athlon came out, Nvidia would have been a good choice, but my lot was cast and I eventually got a Voodoo 5 5500 after a short stint with the Viper 2(Savage 2000, great potential but never realized). FSAA owned me!. By the time the Voodoo 5 5500 became obsolete(HW TnL required in BF1942, NOLF2, etc) ATI was a legitimate player so I went with a Radeon 8500LE. This last year pretty much has been 1 Nvidia muck up after another, which I don't need to expand on, but the recent ballyhoo with Nvidia and various benchmarks and games used as benchmarks made me not even trust anything concerning FX "performance".
As long as Nvidias' vidcard capers don't touch their chipsets, there will always be a space for them in my future systems, but it'll be a longtime before I consider one of their video cards.