I just played around with a 2014 816ce and I really had a hard time putting it back on the wall at GC. They had a new 914ce in there too, but with a Sitka top, seems like you're just paying for more inlay. I love the new 800 series. If I could justify to the Mrs., I would already own one! As far as the GO body style (x18), I'm 6'0" and I got worn out this weekend playing my GS for many hours. I can only imagine that the GO would be even tougher on my shoulder. If it's a sound you love or you're a bigger guy, then don't let me scare you, just my $0.02.
Also, having just played my new 316ce with a group for the first time, I have a new appreciation for the ES2. Group settings seem to bring out the worst in the ES (mind you--not horrible, just mildly annoying). From what I've heard, the ES2 does a much better job of ignoring ambient noise.
All that said, if you handed me XXXX, I'd probably still buy the 2014 814ce and walk away happy. It's got all the new Andy Powers science in it and is the top selling acoustic guitar model in the over XXXX category.