Seriously, for coding I absolutely love a 1920x1080 screen rotated 90°. Still wide enough to see an entire (sane) line, but more vertical space is just wonderful. Can't watch video, obviously, but for a work computer the vertical space is the absolute best. Improves web browsing as well for most sites.

I tried a 36", I can't stand it as a display. Fine for a TV, but it's a little much for a monitor. Although I can't stand more than 2 displays, so YMMV.