[glc]

There is no reason you have to get the same case, any standard ATX case will work fine. Get one you like. A new case will come with fans. I'd go a bit stronger on a video card so gamers won't just reject the system.

Here would be my personal choices for a case, video card, and CPU cooler:

COOLER MASTER HAF 912 RC-912-KKN1 Black SECC/ ABS Plastic ATX Mid Tower Computer Case - Newegg.com

SAPPHIRE Radeon HD 7750 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card ( 11202-00-20G) - Newegg.com

COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible with Intel 1366/1155/775 and AMD FM1/FM2/AM3+ - Newegg.com