Not really a Tiger Direct fan. Better deals can often be had elsewhere. One place you might check out is Microcenter.com. Unfortunately some of the best deals are "in store" only, so unless you live close to one, no such deals. However, they do have other good deals at times.
I also do not care for Biostar. Had three boards over the years and all went bad. I prefer Gigabyte boards, and ASUS and some MSI will do in a pinch.
I do not have any experience with Diablotek, but I don't recall them being revered for their power supplies. If the specs on the PSU are factual, then it should be OK. You might look at this PSU instead. I have one and it is very good. http://www.tigerdirect.com/applications/SearchTools/ite...
You could then get a decent case separately for $50 or less at Newegg. They have the same deal on the PSU BTW.
I have also seen deals on that and similar ram for as low as $19.99 after rebate.
Having said all that, gaming performance is still mostly determined by vid card.