Well having read all the various threads on FSX i have come to a decision.....
I have cancelled my order for FSX, i think im going to wait for Vista and Direct X 10, then see what the performance will be...
I think you have made the correct decision.
I didn't - went ahead and pre-ordered FSX which arrived yesterday. First install went smoothly until I tried restarting the game and nothing happened. So uninstalled and reinstalled the game again and started getting "FSX cannot load" type errors.
The short amount of time I WAS able to access the program I found the FPS crawling along compared to FS2004 - even with autogen off.
So it looks like for me at least, this is the end of the line with my MSFS. Going to keep FS2004 on the PC and continue using that until such time as MS patches the game and/or better PC hardware becomes available.
Returning FSX to whence it came....
Adam