I was considering building up my own pc for running hd porn and other important shit but I'm fucking lazy so I want to buy one... I just got a fat paycheck and I'm looking at this sucker http://www.newegg.ca/Product/Product.aspx?Item=N82E16883229304 I'm not trying to run skynet here so I don't need anything crazy but if you have any suggestions keep them under $500.
I know you said keep them under $500, but if you want to spend another $35 this is a large step better- http://www.newegg.ca/Product/Product.aspx?Item=N82E16883227392 If you are intent on buying pre-built, then that computer should work fine for what you want to use it for lol.
It has a better processor and a better graphics card. Here is a comparison of the two processors- http://www.cpu-world.com/Compare/209/AMD_A4-Series_A4-3400_vs_AMD_FX-Series_FX-4100.html The FX 4100 beats the other processor in every benchmark except for the 7Zip one, which is weird, but could be some lack of hardware support problem. The processor in the first one is a dual core, compared to a quad core in the one I posted. If you are planning on using the computer for more than a year I would go quad core, as dual cores are becoming less and less as everything takes advantage of multiple cores now adays.
I've said it before. Don't buy a fucking pre-built. It's a total waste of money. Build your PC so you can have all the future proof parts then and there.