I've got one of these Ikea desks in my office:

http://www.ikea.com/gb/en/catalog/products/S19807432/

I like it because it comes in plain white, has height adjustable legs and a curved front. It also doesn't cost the earth.

Nice and deep. On mine at the moment I have:

- two 23 inch displays (on a £80 monitor arm clamped to the desk)
- two laptops
- a couple of external drives
- old IBM sized keyboard
- KVM switch
- 8 port switch
- Mac mini
- Squeezebox Boom
- small Dell desktop tower
- HP scanner/printer
- much assorted other crap

They also do some screw on cable trays that I should really invest in:

http://www.ikea.com/gb/en/catalog/products/30200253/