Dell's UltraSharp U4919DW is a 49-inch monitor with a 5120 x 1440 resolution, giving it a 32:9 aspect ratio. This display is equivalent to two 27-inch 1440p displays side by side without a bezel in-between. So if you were planning to run with a dual-screen 1440p setup, something like the U4919DW might be a better choice.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips