i think if you do it Vertical, you have to have 2 of them both in Vertical side by side...
This would be the same for the 2405FPW or the 2005FPW. I have one of each of these
for my setup and I found that by having the 2405 Hor. w/the 2005 in portrait/Vertical, you get a good set-up...
(you can 3 table
on the 2005 when it's in portrait (and 1050 x1680 res.), making it useful for multi-tablers...

Is the 30 inch for sale? I can't find it on the Dell website?