On the lookout

I'm on the lookout for a new PC. preferably a desktop so that it doesn't shut down randomly. I'm going to try and breathe some life into my dying laptop by using canned air and see how much life i can get from it before i bite the bullet. But now I'm thinking that since i have a PS3 again and the only real thing i user my PC for is YouTube I'm thinking i might just get a really nice tablet