Mate, the best thing you could do to start fresh is do this.
As mentioned...
Buy a 120GB SSD and install your operating system on there and some programs that you use regularly. Then purchase a standard HDD (however much storage you need such as 500GB, 1TB, 2TB, etc) and store all your other data on there such as videos, music and photos.
SSD's are coming down in price and Intel are still one of the best on the market. I have a Samsung 840 Series (256GB) which are around $180 now but if you don't need that much storage then grab a 120GB Intel!!
http://www.pccasegear.com/index.php?...ducts_id=25023
I highly recommend setting up your PC like this weather its upgrading, starting fresh or buying completely new!
.