I'm running a fierce machine right now, they're reliable and fairly quick but i would advise getting a proper GPU rather than the integrated AMD rubbish. I'm running a 4.2GHz 8GB ram setup with a MSI NVidia GTX750, another 8GB RAM and the biggest CPU cooler I can stuff in the case on order
Be careful with temperature, they give you standard CPU coolers as imagined, however I have had to underclock my CPU down to 3.2GHz until my aftermarket cooler arrives as temperatures of 95C were occuring, that's enough for a decent cup of tea and more than enough to cook your CPU
Also also also, important thing, they have no WiFi built in, you have to buy a seperate card for that but if you buy the one they advise then they'll install it for you before shipping.
Fierce also don't install drivers on the PC, make that the first thing you do. Install ALL the driver disks (stuff the screen one though, it's only a user manual).