Classic:
HTG:
I know you didn't mention it, but if weight is not an issue, I'd go A5. I love that stock.
The HTG is sort of a 'tweener. It's not quite a dedicated hunting stock and not quite a dedicated bench/prone stock.
The Classic is a really nice stock. Sort of a beefier Mountain Rifle stock.
I think the best way to decide which stock to use is by first deciding your final rifle weight. If you want heavy (i.e. 15lbs or so), that means a big ol' barrel and thus a big stock like the A-series stocks and the HTG. I'd think anything under a Remington Varmint/Sendero contour would be too small for this stock.
If you want something smaller, say #3-#5 contour, you're looking at something like the Classic or maybe even the HTG. Finished weight should be 8-10lbs here.
If you want to go smaller than that, the Mountain Rifle pattern is your ticket. I've got a Douglas No. 3 in a Mountain Rifle pattern Mickey and that's as large as I'd go. One quick note...keep in mind that PacNor's contours run on the large side. I've got a No. 1 PacNor that's almost as big as my No. 3 Douglas.
-Dan