Im not so sure about the 9800GTX+. When I was looking at graphics cards the other day, contemplating upgrading, I found the GTX260 was about £30 more than the 1GB 9800 here in the UK, for me that's money worth spending given the performance increase at the resolution I use.
Out of interest what card did you upgrade from?
I decided in the end I'm not dropping any more money into my PC for a very long time, my 8800GTS is fine for now, spending another £200 just to play games doesn't seem worth it for me.