Looking at a very lightly used 7600 carbine at a shop near my office. It's not had a scope or even sling swivels mounted. It's a newer model, which is the only reason I haven't pulled the trigger on the deal yet. It's priced well.
Haven't you pulled the trigger on that yet ?
Per your ? about 760 or 7600, obviously - IMO - both are very good. I have friends who have had 7600s for years with NO problems.
Myself, I always bought M Sixes and no regrets.
I have had a couple of 760s, one I rechambered to 35 Whelen again NO problems with either.
I personally like/prefer 7600s because of appearance and the new bolt. Other's MMV.
Jerry