I just got a Lenovo Thinkpad T540p with a 15" 2880x1620 display. Despite all the changes in this generation's Thinkpad line, I really like my purchase. The keyboard is very good and I'm okay with the trackpad, since I tap rather than click. I'm running XFCE, which works well for the most part with my HiDPI display. I've got Bumblebee installed to switch between my discrete Nvidia and Intel GPUs. For $1200 I got this amazing screen, Intel i5-4200M CPU, 4gb memory (added another 4gb), 500gb disk (swapped for SSD), dual band Intel wifi with support for AC, and 9 cell battery.