Need advice for a new upper

[RTodd]

Hello,

I am new to your forum, and have come here looking for some specific advice. I've shot a number of different competitive disciplines, and have a pretty good base of experience, but the .300 fill-in-the--blank seems like a pretty special application, and I'd like to get it right on the first try.

Here is what I think I want:
1) AR-15 with A2 stock and Giselle trigger (that was the easy part)
2) a 16" barrel threaded for a can (though silencer is down the road)
3) a flat top, since I intend scope only use
4) varmint style float tube
5) variable gas block and side charging handle (in case of future can use)
6) premium tube (Douglas, Kreiger, etc) to increase odds of 1/2 - 3/4 moa
7) whatever else is needed to give me the best chance of achieving my accuracy goal
8) spend what is needed to achieve the above, but not "waste" any money

I'm guessing this means a custom gunsmith, but I have no idea which one. My AR smith (Frank White) has no interest in non-Highpower Across the Course rifles, and I've never used anyone esle.

I will appreciate any and all advice, and please help me avoid any pitfalls. My primary interest is in 190gr plus bullets for subsonic loads if that comes into play in my twist choices. If you prefer to share your smith choices by private messages, I'll take the help any way you like.

I have read extensively on your forums, but piecing it all together gets a little overwhelming.

Best Regards and Thank You,

Randy