Well I like Thumbhole stocks, I have two right now and working on a third.
#1 with a Thumbhole is a Rem 26" barreld 25-06 with a bell and carlson
(kinda of a crapy stock, black fiberglass/kevlar light but some what weak at the forearm, but works well )
#2 300WBY vanguard with a boyds ross Thumbhole, good stock, a little on the fat side on the forend but stout.
#3 will be a 338-06 on a boyds Ross Thumbhole..work in progress.
There are two main reasons I like thumbhole stocks:
1. it is easier to control the rifle while crawling on your belly sneaking up on a critter.
2. Felt recoil is tamed a lot because the web of your hand as well as your arm helps control recoil. This is a very good thing for people who(like my wife who will get the 338-06) to shot accurately from any posisition and to dampen recoil.
Take this test, take a heavey kicking gun and lay on your belley and shoot it, take a same weight same caliber gun with a Thumbhole stock lay on your belly and drop the hammer, you will feel the difference and your
collarbone will thank you very much.