On the PSU, definitely change that out. The only good PSUs Cooler Master makes are the Silent Pro series, and they're a bit expensive. I'd recommend something like a PC Power and Cooling Silencer Mk.III, Seasonic S12II or M12II, or Corsair TX-V2.
On the case, Silverstone is a fantastic brand, and they've got some really pretty full towers. Corsair's Carbide series is another one to look at. The NZXT Phantom would be my personal pick (factoring in price/value and all that).
That PSU is from my older build when I first try to replace the GPU for my prebuilt hp one (had to buy a PSU cause their stock one is only 350w). I didn't know *** so I just bought a random one at fry's. Do you guys think it will last me a little bit more or do I have to replace it? This was like 9 months ago.