Any UI can be used at any res. Some like extreme do have issues with lower res sizes but none that I can think will have trouble running at widescreen or high res settings.
Now there my be no premade ui setting file for your exact res but all it takes is for you to move the windows into place.
I have the same screen size and use Profit with it. It's great, just rquires you to move a window or two when you first load it, but nothing major. Allows me to have six hotbars up across the bottom (3 and 3) with space to spare.
...honor is a harder master than the law. It cannot compromise for less than 100 cents on the dollar and its debts never outlaw.
- Mark Twain, a Biography
I play on both my desktop and my laptop. The laptop has 1440x900 resolution. I use the FetishNightfall UI and love it. It works quite well on my laptop as well as the desktop. As others have said here, the resolution of the display shouldn't make much difference.