Monitor cable note: You don't have to use the expensive dual-link DVI adapters if you have a monitor that supports the standard sized DisplayPort.
You can get a simple Mini DisplayPort to DisplayPort adapter (and DisplayPort cable) and it supports the full 2560x1600 resolution of monitors like the 30" Dell.
https://www.amazon.com/dp/B003TSDG06/ref=as_li_ss_til?tag=dr...
(note: summary description says max of 1920x1200, but detailed description says up to 2560x1600. I'm using it on a 30" Dell, so it works :)