I'm sure ATI has improved a lot in the last three years. I bought an All-In-One-Wonder back then and although it did the dishes it didn't render Hitman worth a darn, with their latest drivers at that time. Everything changes though.
Personally my PC dollars are precious so I will be buying the best ATI at one store and the best Nvidia at another store. I will be trying one for a few days, and then the other for a few days. The winner I keep, the loser goes back to the store.
As for my G4 Ti 4600, I am still impressed as its mated to a 1.2 Athalon and 512 of PC 133 memory. 1024x768 pretty smooth with all the options maxed out. Latest drivers of course.
This card is two years old and Until recently I could see the better performance either in 2D or 3D with each driver update. I think this card is close tothe the end of the line though, as all the custom 2003&4 models I Have running look drop dead gorgeous at the highest resilution. I want that, I really want that. I'll still wait a couple months though and let the ATI competition show it's stuff and then let the OEM start underbidding eachother.