In my opinion I would go with the Mil-Spec. I like a more GI style 1911 so "suped up" ones do not appeal to me that much. Of course I do like 1911's like the SR1911 that do have some of the things people like to add to them, but do not have the full length guide rod, front serrations, and ambi thumb saftey.
"It's a gun you loaded on Sunday, and shot all week."
"If God didn't create man equal then Sam Colt had made them equal."
"Fast is fine, but accuracy is everything."