Charlie, sorry I jumped in late I have been very busy with some personal stuff of late. Acer builds a lousy box. If you really don't want to build your own the best thing to do is find a good brick and mortar store that builds custom units and pay through the nose(custom game units start at around $2500), but you can customize and take it back when or if problems crop up. The Walmart units are terrible beyond belief-service is another issue. Ordering on line is risky because you often cannot get good tech help when you need or they charge you for it after the first three hours.
You will also find that unless you can overclock the Q9300 it is a bit anemic for gaming. The Q9550 is better processor stock. The Intel Penryn Core 2 Duo- E7200 and above are even faster for gaming right now, however all new games are utilizing quad core now...FSX does a poor job it however.
I only build game units for Texas residents because of the horrendous shipping and insurance costs out of state. My suggestion is to build your own. It isn't rocket science and there are lots of guys in here like Butcherbird, David L6, HeyMoe, Kilo Delta etc that know their stuff and would be glad to help you.
I also can help you, but I quit doing it for free for various reasons I won't go into, but I am not all that expensive. I also have tons of references.
This set up that Butcherbird has here is a nice under $1200 build and don't be fooled by the low numbers of the approval rating for that board. There are a lot of stupid kids who try to make this into a fast overclocker and really don't know what they are doing. The Gigabyte P45 is an exellent, easy builder.
Here is another nice inexpensive motherboard:
ASUS P5Q Pro LGA 775 Intel P45
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131299
Hope this helps ya Amigo,
Ted