I wish someone else besides Apple would discover the 16:10 ratio. I love my MBP but every company I've worked at has been allergic to OS X. Right now I'm stuck working from home on a 1366x768 screen because it's "business-class".
Supposedly the fhd (1080p approx) has much better battery life. I regret getting the 4k screen. For OP above, what's your battery life like? Mine is so bad I keep thinking something must be broken. I'm not doing compiling all day either, doing small things in bash, not killing the cpu, web pages.
I'm with you. I much prefer using my older non-Retina 16:10 displays than my newer 16:9 Retina display. Microscopic pixels are nice, but an extra 10% height is huge.