Although I have 1 MSI MB computer, I'm not a big fan of them. Of course everything depends on budget and what the comp is going to be used for. First, get rid of the 550w power supply and get a real one, then decide if want something like the duo core 8400 or quad core 9400. Memory can run from the cheaper 800 up to the uber 1200 depending on $ available. Stick with the NZXT Tempest case for @ $100.00, TD built my comp in one and I used it for my last customers build, it's just fantastic.