First off, apologies to DA0024 for not answering his question sooner, been extended AFK a bit lately.
I love the YHM flip sights. I purchased the gas block flip sights directly from YHM. The only flip up front sight on the pic you quoted from is no longer in use since it was meant to be used on a gas block and not a top rail, it's too long. I should mention that the rifle in the pic you quoted me from no longer exists in that form at all, it looks completely different now, far superior to when I took that particular pic.
It now looks more like this (not counting the 1mm adjustment needed to straighten it out after this pic taken):
With extras like Eotech, Phantom 5C2 FS, and AFG, sight down
Without extras like Eotech, Phantom 5C2 FS, and AFG, sight up
To Savagemic, I love the AFG, more natural grip feel for me then a VFG of any kind I've tried. It works even better now that I've swapped out the rail system to a thinner, less rounded rail system. The DD Omega X rails narrower mid width allows for a seemless and comfortable grip when using the AFG, and allows my tac light pressure switch to mount completely tucked in and out of the way, but easily reachable by my fingers of the hand holding the AFG.
The AFG felt better to me then a VFG, but your milage may vary on this one, it's really down to preference.
Update: I had the MOST wonderful range experience during testing of the new setup. First off, I apparently got the gas system put back together perfectly, 1st try, since the rifle cycled smooth and cleanly all day. Secondly, apparently, since I was using the same receiver as before, the zero I had setup on it was still valid for the new rebuild, and I only spent 30 rounds to confirm zero instead of having to establish it again with god knows how many rounds and laser sessions.
BUT, I have to say, zero was BETTER then before as I could never seem to achieve a perfect zero before and had to use a hair of down-right windage to get dead center accuracy, because the rounds tended to spin off up-left of zero no matter how far I adjusted the sights, the zero kept just out of reach. Now, it's perfect dead on centered. First 3 rounds when right into the 1 inch diamond and were touching each other. The following 27 rounds turned that into one larger, 1" at widest point of the hole, but was only the size of 2 rounds side by side across the middle, indicating drift in my aim, not the rifle itself. I am totally happy with those results. The rifle is now more accurate then I am, as it should be (giving me something to build skill up to match, not the other way around which is frustrating).