Do you really need an Hk? Have you considered any U.S. manufacturers that provide what you're looking for? I love my Hk just as much as the next person, but I don't feel that their take on the AR is any better than, say, LWRC. I've been fortunate enough to handle a real 416. Gemtech supressor and all. While robust, I don't think it was the end-all AR. So, to answer your question: No. I don't need to see one. Your money is your money, though.
"How's ya mom 'n 'em?"