If you need a new computer, or service on yours I highly recommend visiting Red Seven. These guys know what they are doing and they are out to give you the best product at a great price. Tell them what you want to do with your computer and they will custom build a new machine that will do everything you need it to. If you don't have a lot of $$ they will sell you a used machine that is light years ahead of what you might pick up at a retailer for 5 times the price. Small business owners, give them a call and ask them about their perpetual PC deal.
If you need to pick a brain, this is the place to go. Save yourself from the big Corporations - you will be buying a first rate backed product with mom and pop personal service.