No problem, anytime. Thanks for the budget, I've come up with this:
CD/DVD combo drive:
http://www.newegg.com/Product/Product.aspx?Item=N82E16827151233
Antec Three Hundred Case:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042
Seagate Barracuda 1TB 7200 RPM:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148697
AMD Phenom II X4 965:
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103727
ASUS M5A97 AM3+ Motherboard:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131767
PowerCooler Radeon HD 6770:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131434
Corsair Vengeance 16GB (4x4GB, two sets of 2x4GB):
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145345
Cooler Master Hyper 212+ CPU Cooler:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
Corsair TX650 V2 Power supply:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139020
Grand Total: $710.51
I had to go with an AMD CPU to meet budget restraints but that processor is no pushover. I also chose to go with an AM3+ motherboard for future expansion. The new "Bulldozer" CPUs from AMD are due out in the relatively near future (though it keeps being delayed) and also will be using the AM3+ CPU socket. Since you are not a high end gamer, I went with a Radeon HD 6770 because it will pretty much max out any game that's not very recent. It should have enough power even for games like Call of Duty if you ever desired to play it. Both the card and your motherboard also support CrossfireX, which allows you to put in another 6770 and use them in conjunction to increase your graphics performance. It's not 100% scaling, but it definitely would breathe some new life into your system a few years down the road. I still say 16GB would be preferable since you want to run many bots but if you wanted you could only buy one set, but keep in mind the likelihood of running 10 bots + doing general tasks on your PC with only 8GB isn't too high :/