Very nice! The sight goes well with the overall look of the rifle. I actually like it in the 2-tone, it kind of suits it.
I'm in the 2-tone club as well, personally I don't care, mine is green which is one of my favourite colours anyway... Just bought a Goetland sight for my M933 off Amazon yesterday which should be arriving tomorrow. Going for the old-school carry handle-mounted look.
Wanting a pistol as a backup too, however AEPs are crazily thin on the ground for some reason. Heart set on something trad-styled and compact... 1911 or M9. Did fancy a DE however they're like cannons... can't be bothered with gas - more maint, propellant, cold issues (I'm in the Highlands), most springers out there seem to be disposable cheapos that break within 5 mins of first use. Plus semi-/full auto useful. All just my newbie opinion of course, we all have our preferences...