Best computer desk I ever had, by far, was a old $35 conference table I got at the local thrift shop. About 5 feet wide, 8 feet long and built like an ox. It had space for everything. Even two 20" CRTs back in the day.

With everybody using flat panels these days all you would have to do is get a few dual panel stands (vertical kind). Real estate to spare and it will hold 500+ pounds of whatever easy.