So I just picked up my new 15-inch base Retina yesterday. Pretty awesome machine. Glad I got it. Two questions, though: 1) Are there are detrimental effects from running an external monitor? In other words, will the display on the Retina stay the same even I've hooked up the extra device (I do not have screen mirroring on). Will it slow down performance at all? And if the answer to yes is either, does the Retina recognize once I unplug the external device to revert to its default settings? 2) Is it just me, or is Safari noticeably faster/better looking than Chrome?