what nightfox + Lipzo have stated before. tell us your budget so we can help you more. we also dont know WHY you're constructing this monster, for whatpurpose. gaming? intense photoshop? Benchwork? if you want the Top of the top products and are willing to spend a @#$@#%#^ load of money on it, we can certainly help you, but right now we, as a forums, are probably hesitant to respond because of lack of information.
intel is definitely pulling way ahead than AMD, and i'm an AMD supporter so i can't really tell u the best as far as processor/mobos go, ANother thing, Processor is the same thing as the cpu. friendly reminder.
Great case that's not too expensive and is great quality:
Newegg.com - Antec Nine Hundred Black Steel ATX Mid Tower Computer Case
very good RAM i would generally recommend this brand more than this product, depending on how much power u want in your computer:
Newegg.com - G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBRL
If you're really willing to spend the money, GPU:
Newegg.com - GIGABYTE GV-R699D5-4GD-B Radeon HD 6990 4GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready Video Card with Eyefinity
this is all i can recommend for you if u want top end products.