Re: nemesis arms
I haven't shot the Vanquish, but I have had the pleasure of shooting their .50 which was an extremely nice gun.
The only feature that these have that I would prefer over a standard custom rifle is the quick change option. Other than that, I just don't see a need for it, and I would prefer the ergonomics and stability of a standard stock.
I agree that these look awesome. However, looking awesome and being useful are very different things, and they do not always intersect. Many times they do on this board, but before sinking that kind of money into it, I would do a LOT of research, and see if you can't find a way to hold one/shoot one.