A little reading-challenged, are we?
This lack of flexibility is the biggest thing that sort of makes the ACD a rip-off, in my opinion. If for some reason you don't want to go Dell, I'd say Samsung or possibly Viewsonic are your top choices for quality, although I haven't found many monitors to have the plethora of connections like the Dells do. We also know for a fact that the Dell 20" and 30" use the same panels as the Apple 20" and 30".