I am here to vote for the 16 w/ AppleCare+...The keyboard is a point of concern but I really would not want to pay that much for old technology...I am convinced that in 3 years when my AppleCare runs out that if my keyboard hasn't failed by then, its not going to. So far so good here. Keep in mind that people only come around to voice their opinion when they feel they've been wronged. There are millions of Macs with this keyboard out there that haven't had any problems, mine is one of them. If every keyboard was doomed as people here seem to think, Apple would've made a statement about it already. I find this keyboard to be a joy to type on, and mine is reliable while cold, hot, and everywhere in between (holds consistent feel).
As for battery life, I also haven't had any issue with that. I use my computer all day every day for school, w/ parallels always running...manipulating big data in Excel...plenty of web browsing as well as taking notes, and even on my 13" wTB (which is supposedly the worst offender) the only time ive actually had my battery die, it was after 11 hours of hard use...I did not get off it between my 8am class to when it finally died at 7pm...The biggest thing is to keep the brightness down on this super bright new screen. It is beautiful at full brightness but it draws a ton of power...I usually have mine around 50%.