Five Things to Consider When Buying a Computer
If you're getting a laptop, Wi-Fi is a given. You'll want to make sure you get one with an 802.11n card in it. Wi-Fi is less important in a desktop machine that won't be moved much, but, if you don't want to place it near your modem or router, you may want to consider wireless.
Bluetooth is also worth considering if you want to sync a smartphone, or use a wireless headset with Skype. Lastly, serious road warriors will want to consider a dedicated 3G WAN card for getting online when Wi-Fi isn't available.
If your aging printer is up for replacement, you can snag a great deal (or free printer) when buying a new computer package from many stores. Those that print a lot of text documents will want a laser printer, while users who only occasionally print charts, graphs, and Web content would benefit from an ink-jet. Shutterbugs may want to consider a dedicated photo printer.
If you bought a desktop, you'll probably need a monitor (or two). Go with a 20-inch model or larger (any smaller and you might as well have gotten a laptop) with at least a 1600x900 resolution. For anything larger than 20 inches, you'd be wise to jump to a full 1080p screen.