Well, I'm not particular about either. I've only played a few games, mostly on 1399s, and one SP run on a 1453-not enough to have a strong opinion either way. To me, it seemed the 1453 set everything on a more historical path, but that was with AI everywhere. I'm certainly fine going with 1399. Just to avoid waffling back and forth, in case there are other words coming forth about it, I'll give it a day or two before setting it in stone.
And what silktrader said, CEST.