Pick a case you like the looks of. They all do the job of keeping your stuff in one place well and if you're spending more than $40 on the case, airflow should be good enough. The aesthetics though only you can make that call on and you have to look at it.
Depending on how aggressive of an OC you want, I can look for a HSF also. Not sure what the current go to is for price/performance. I'll do some digging.
Looking further at the MC site, looks like the HDD, Case, CPU, and HSF are all great deals at mc. Mobo is about the same at either. And for the GPUs, ram and corsair PSU, newegg is much cheaper there. Antec and OCZ look to be about the same at both.
For just the little extra for the ram, might be worth it to just get it all at MC if you're careful. I wish I had one close by. I've got a 2 hour drive to get to the closest one. Not worth the savings in gas cost for just that purpose, but maybe I'll have to find another reason to be over there. Those are some great deals.
As for MC, no, its not just OEM cpus, that just means there's no HSF included and it comes in just a plastic tray. MC may sell those, but so does newegg. Both sell retail versions also. If you're going to OC and buy an aftermarket HSF anyway and its cheaper, get the OEM. MC is super cheap on Intel CPUs because they are a launch partner.
Throw Fry's into the mix and you can do really well. This ram isn't as tight on the timings, but for $70, a great bargin. od5" rel="nofollow" target="_blank">http://www.frys.com/product/6088628?site=sa:Hard%20Driv...
Well, you have great options and if you do a little homework, will get great value out of your purchases. What apps you running for the vid editing and what games you plan to play? What monitor res? If I know this stuff, I can suggest a GPU.
ill be using Sony Vegas. I just have an old Samsung Syncmaster 175v. it is said that the max res is 1280 X 1024 so maybe that? i also have a 720P 32 in. Vizio HD TV in my room i might use from time to time. but im not completely sure.
A 5750 is all you'll need unless you plan to upgrade the monitor. The PSU shouldn't need to be more than 450w or if you want CF as an option, 550w. A 5770 will fit in your budget and you'll max everything for a long time.
The 5750 and the 4850 perform similarly. Just from memory, I think frys had the GTS 250 for $70 amir. That would be best bang for buck if they still have them in stock at your store and perform the same as these two ATI cards. But only the 5750 has Dx11.