Well, my recent experience with MWave has been contrary to what most posters are saying. Like Kingofcomputer, I also got the bait-and-switch power supply on an Enlight case. The Award PS they put in there was not AMD approved and the Enlight 250 it should have had was. No explanation of this switch on their site. I had to rma it and get a different one which cost me an extra $14 bucks for an AMD approved 300 watt PS and then $9 to ship the old one back UPS insured. This is not the end of the world, but I would have rather known what I was getting up front. I probably would have made a different purchasing decision. In addition, the whole experience with customer service took forever and was very unpleasant. Obviously, some people have had much better luck than I did, so YMMV. Just thought you might want another opinion. I doubt I'll do business with them again.
Oh, as far as memory goes, in general, I think it is always worth it to spend a few extra bucks and get name brand stuff. I am partial to Crucial memory, though PNY and Kingston have worked fine for me as well.