I also want to add another thing to consider.
5. The barrel diameter. It is aesthetically appealing if thechannel matches the barrel.
A small diameter or sporter barrel looks odd in a stockdesigned for a bull barrel. If you have a heavy barrel and buy a stock with asmall channel you need to understand how to enlarge the channel if necessary.

I apologize if I got too basic but those were the things that I would consider and saw no mention of that in you post.