I don't know... a suit just seems like one of those things I'd never buy online. Even though you'd likely need a little tailoring, at least when you try it on, you'll get a real idea of how something will look on yourself (and especially important if you want to drop lots of money on this).
But as to what you picked - the way the jacket fits on the model seems really crappy. I'd buy something else and look to spend a lot less money on such a purchase. No need to go all out and drop big bucks on a suit, especially the first one. When I needed a suit or two a few years ago, I just went to a MW during one of their many sales. I didn't know what would look best, so it was nice to have some guidance on picking something out. Obviously, you'll want to ignore some of the upselling that goes on. And as for quality and fit, I've been pretty satisfied with both.