I really appreciate the feedback I have received so far, and it makes sense to me to spend the extra money to get a quad-core, and and the complementary level of components to go with it.
If I stepped up to the 940 or quad-core, (which at this point I have to agree with) which motherboard would you recommend to pair it with? I keep reading about the deterioration of the ASUS brand and the * * Due to AMD CPU limitation, DDR2 1066 is supported by AM2+/AM3 CPU for one DIMM per channel only** disclaimer. But I also hear about quirky issues with the Gigabyte's as well regarding drivers, audio problems, and difficulty getting to 1066 levels, although the construction is highly touted. What is your opinion or recommendation?
Some other items I am still struggling with: the case and the power supply. I would like to find a case that is functional, not cheap looking, easy to install the components in, with front mounted port (usb's and headphone jacks) that does have a swinging front door... I also don't know how many fans are needed and where they are best placed. Any suggestions would really help as I have no clue.
Regarding the power supply, if I go to the 940, it is a 125 watt CPU coupled with a 1 gig (most likely) video card, so I am not sure what watt level is necessary to avoid a future power supply failure.
Lastly, since I have bitten the bullet to step up to the quad-core 940, what video card would you recommend to complement it for the Flight Simulator application? The 9800GT was recommended by Helloworld_98, with an AMD 940 and a better motherboard, what would you recommend? Thanks.