Frank,
The i7's are great chips...and I don't know of any place that you can get them cheaper than Microcenter (individually) or Fry's (in a motherboard combo deal), assuming that you can get into a physical store.
Keep in mind that, though, that there are 2 main i7 cpu's right now -- the i7-920 and the i7-860 -- and they both utilize different architectures. It's a lot of differences in the 'fine print' that don't amount to a lot of real-world difference. But what you do need to know is that the i7-920 utilizes a completely *different* socket set than the i7-860.
The two boards you picked out are for a Socket 1156 chip -- and that physically *won't* work with a i7-920.
So here's what you need to know:
i7-860 -- Socket 1156 -- dual channel RAM (2x2gb, 2x4gb, 4x2gb, etc.)
i7-920 -- Socket 1356 -- tri-channel RAM (3x2gb, 6x2gb, 3x4gb, etc.)
IOW, depending on which i7 you buy, it'll affect what motherboard and RAM sets you need to pickup as well. When you finally get the thing built, you probably wouldn't know the difference. But when putting it together, you have to make sure you have the right pieces of the puzzle.
Otherwise, you'll beat yourself black and blue when that i7-920 won't fit in either of those 2 mobo's you linked! 
The i7-920 and 860 both cost about the same now...but the former is generally is generally the more expensive route. It means you have by a RAM in triples. So instead of $95 for 4gb (2x2gb), you'll be looking at $135 for 6gb (3x2gb). Also the 1356 boards run a bit more expensive (unless you can get one with a Fry's deal, where the cost is significantly discounted!) for similar specs.
1TB is right now about the 'sweet spot' in storage (in terms of $$-per-gb). So I definitely wouldn't buy any more than 1-gig. But, yes, if you're looking to save some bucks, 500gb is plenty to get started.
Power supply: Corsair, Enermax, Cooler Master, OCZ....all are good brands. Usually, at Newegg.com, you'll find one of these discounted with free shipping each week. Unless you're running a powerful graphics card (which you don't need unless you're gaming!), 450/500w should be more than enough.
frank87 wrote in post #9754280
I'm low on my budget and looking to build my self a new computer. I recently bought a 50d and looking to get a 5d or 5d2 by the end of this year. I dont really need anything fancy just something that will get the work done. Ive been reading on here and have found some parts that i would like to use for my new computer. I would like to buy the parts from fry's or micro center depending where i can get them at a better price
I'm looking at getting:
CPU...Intel Core i7-920 from micro center (looks like a hell of a deal)
Mother Board-both of these are used. recommendations for around that price?
http://microcenter.com ….phtml?product_id=0317309
or
http://microcenter.com ….phtml?product_id=0317949
Ram: For right now 4gigs of ddr3 sound just about right. I should be able to find them for about 120 bucks (would upgrade down the road)
Hard Drive: would 500g sound ok? I could always add more when needed. Down the road i would also like to add a sdd drive
What should i get for a power supply? Ill get a cheap case
What else am i missing? Help a guy on a low budget out lol.