I'm a bit of a minimalist, so I don't care about addons and crap ...
Then Lynx is the browser of choice
I'm primarily concerned with things like speed, system integration, aethetics, etc.
Ok. Maybe not in this regard.
Seriously: When you use the browser for browsing some plain old webpages and not as a thing-doing-everything-humanity-can-think-of, it doesn't really matter which one. I personally installed Safary as soon as it was available for download on day one, because the Browsers available that day were IE and Netscape, and no matter how good they are nowadays, back then, they stunk (stink, stunk, stunken, is that correct?).
I've tried other browsers since then but still, Safari is the browser for me. You can customize it to a pretty minimalistic look, even automatically hide and show the adress bar, so you just have a window with the title and below: nothing but content. System integration... I don't really get, what you want with that, but anyway, Safari uses Webkit (Chrome too) which is part of the system. Aesthetics: It's standard, which means, non-distracting. Speed: The hype around the speed-comparisons is over, all browsers are very good.