On average I get around 20/30ish FPS on my main client in dalaran, although it's been a bit choppier lately since my RAM has been capping out (I turned my texture settings on all clients up, hence the soon to be 12Gb). As far as monitors I'm just using a 19'' widescreen with a 19'' regular LCD monitor.

But in general I get some good performance in dalaran. (My Solid State Hard Drive does make a nice difference)