I usually upgrade my CPU and whatever else I can every year but my last unit was over five years old, so I bought a nice ASUS from my friend who owns a Computer and Tech shop just last month. We put a nice Intel7 Cpu in it and a great NVIDIA graphics card in it and it's now a G11 PC. I've found that most desktops are about done when they reach about five years old. If you look around a lot. you can find good prices on ASUS or Lenovo units for a good price. Just buy the tower and use your existing monitor and speakers and keyboards and such. It's better to buy one from a dedicated computer store as you won't get all the junk on it that you do when you buy one from Best Buy, etc. This unit is a beauty and only cost me about $800.00 with the mods I added. Look around and you'll find some good deals and I can even give you a number to call to ask about a nice unit. Lenovo or ASUS are the best of the bunch!