I voted H-S. That is the only stock I've shot of your three choices. I find it quite comfortable and is built with plenty of barrel float. Built with an aluminum bedding block. No bedding needed
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.  But small is the gate and narrow the road that leads to life, and only a few find it.
If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger
Friends don't let friends develop canonitis!-chucknbach
arguing over the internet is like the special Olympics....even if you win, you are still...special!
McMillan A5 all the way. Fit and finish is perfect. Manners could not inlet a stock correctly if their lives depended on it. I have ordered 5 Manners stocks for customers and not one was inletted corectly. McMillan from here on out.
Paul, please read the LRH rules about advertising and self-promotion.
I'm going to throw a monkey wrench into your thinking.
There is a tacticool factor associated with the tactical stocks that draws a lot of people to them. They are great for what they are designed to be too.
However, unless you are planning solely to shoot them from a bench or prone you will find them a PITA in the field.
The McMillan A-3 hunter is a great compromise vs going "full tactical" as is the precision stock works (made for them by McMillan and I'd encourage you to look at both unless like I said you are strictly planning to shoot from the prone or bench.
I have five HS precisions I like very well too. The Manners I have tried I had a similar feeling of as the above poster, felt like I was snuggling up to a piece of railroad iron or a 4x4.
Without the First and Second Amendments the rest of The Constitution is Meaningless.
Gotta love McMillans. The Gamescout is also a good choice for more of a hunting rifle. It has the vertical grip but slimmer forend. I was going to go with one but decided on a heavier barrel and had to step up to an A3 with a wider front.
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not"