FWIW, I think the extended length K-var stock set will help with your comfort level and cheek weld/Kobra issue.
Just a guess, but from how you describe how your rifle 'fits' you I can only compare to how mine fit me. I dig the 'shorty' stock the AK is known for, the look is part of the Kalish mystique.
Comfort though is where it's at, accuracy tends to follow. You'll probably never meet a anyone who says "Damn, this gun shoots great but the stock is too short." I'd be willing to bet that you will meet a someone who says "I didn't like this gun until I changed the stock set for a longer buttstock."
Wood or polymer, I like both, standard and extended length. There is no peer pressure here, try both and choose what feels the best.
It's not easy from the order form, but then again these items come up for sale frequently and if you have to 'try it before you buy it' you can either buy new or used to make the decision.