If the SBE II is what you need for the 3-1/2, then I would stick with the comfortech stock and avoid the classic. If you are open to just the 3 inch shells, then you should look at the M2's with the comfortech stocks. Both are excellent, but the M2 you can find for a much better price.
... not trying to deviate from what you already know, but just adding some perspective from experience.
"Good judgment comes from experience, and a lot of that comes from bad judgment..." - W. Rogers