I highly recommend the Dell XPS systems, the XPS 420 is a very nice system to build up from. (order code RXCWQJ2)
As others have suggested get the minimum memory and disk space. Those you can upgrade yourself post purchase. The Dell Ultrasharps are very very very nice monitors and you get a very good discount when you buy it with a computer. The base system from above is < $1000 without the monitor, the 24" Ultrasharp monitor is another $700.
At one time I would have agreed,however after owning several Dell machines and watching their service go downhill I'll never buy another

