I like your style , I think if you're gonna go it you're gonna do it right. If I recall correctly, the Lone Survivor 4-man team had 2 snipers and 2 spotters.
The two snipers, Marcus and Axe, carried Mark -12's. The other two carried SOPMOD M4A1's with ACOGs ... I think you could, with some effort and more than a little bit of money, could copy the Mark 12 that Marcus and Axe carried.
I personally like the Mark-12 SPR style rifle with the PRI gen iii free float tubes, the Ops Inc muzzle brake (even if you'd not suppress it) and I would use a Magpul PRS stock for mine even if that's not exactly the mil-spec stock, I think it would set it off really nice.
I did my 15-22 as a combination Mark 18 CQBR/M4A1 style... I have a Magpul OD Green MOE Stock permanently in the closed position (i used to live in NJ and I never thought 5 years back I would move to FL freedom), the Magpul OD Green MOE grip, OD Green AFG, OD Green MBUS, an Aimpoint Micro w/ DD tall mount, and a custom camo pattern of XTM Panels covering the full length of the rail except the AFG area and sights. I did in fact try covering it with only OD Green XTM panels but this forum accurately pointed out that it looked AWESOME with my digi-camo pattern and much more like a green soldier toy rifle with the fully-green XTM panels.
I still sometimes want to get another 15-22 and make it into a "suburban sniper rimfire rifle" with my own creation ... but I have a fully-snipered sporter-style Remington 597, my old man has a sniper-style 597 HB I got him for Christmas, I also have a hunter-style Savage Mark II GXP, so I have the sniper-.22LR area covered. But hey, if I had the money, it'd be sure fun to make another 15-22 project!!
Good luck and post pics.