I currently have a mac mini and I run a U2412 as my primary display and a 20" aluminum cinema display as my secondary monitor. Originally I planned on just getting another U2412 to match but then I stumbled up on the U2713 and now I am not sure which one to get. I always felt the 24 was a tad in the small side for me. My desk is a ikea fredrik which is only 55" long. I could probably squeeze the 27 on along with the 24 but it would be tight. I plan to mount them on vesa arms too. I dont even use my secondary display all that much. I would say i have it on maybe 60% if the time. So maybe the 27 could replace both? Has anyone ever gone from dual displays to one larger display and regretted it? Thanks for any advice.