I got the Antec 630. It is a regular sized mid tower. I could not fit the 830 and 1030 on my desk. They are about 2" taller and deeper. Expect to pay around $100 for a case and power supply. These two items can make a big differance on cooling and stability and will likely out live the rest of the parts in your computer. You CPU and graphics card get upgraded every 1-2 years and sound card, hard drive, memory, and motherboard every 2-3 years if you are trying to keep your system even close to up-to-date. The case on the other year should last you at least 10 years and the power supply about 5 (unless they really change the standards).
The COMPUTER is your FRIEND!
Happiness is manditory.
AMD Phenom II x4 945 3Ghz | ASUS M4A77TD | 2X WD 1TB SATA 2 hard drive | 2x2GB Corsair XMS3 | nVidia GeForce 8800 GTS | ATI TV Wonder Theater Pro 550 | Antec P-160 case | Antec 650w Earth Watts | LG Blu-ray Super Drive | LG DVD RW | Windows 7 Pro