I have an iMac 27" (penultimate build) that supports dual monitor.
I have my 27" Dell hooked up in that role via a Mini Display Port to DVI adaptor.
That setup delivers poor resolution on the Dell.
The Dell also has Display Port and HDMI options.
There are cables available for MDP to DP and MDP to HDMI but I am unsure if there is a difference in the resolution support offered by each option.
Anyone know?