Hmmm, a matte screen might be nicer, but I like the idea of the Apple displays having a built in magsafe, USB and FireWire (I see that the Dell has USB, but I need the FW more)
It might not be important to you, but the cinema display also has built in 2.1 speakers and iSight camera. As someone who uses my laptop speakers for most things, this tends to be an upgrade for me.