If it were my money?
I wouldn't spend $4,000 on a Lion Country Grade V. That's just a Ugartechea model 110 being sold under a retailer's name. If I wanted a Spanish side lock and had 4K to spend there are better values than the Ugartechea 110.
I also wouldn't spend $4,000 on a box lock, regardless of maker. That's about ten times what a nice, used, 12 gauge Spanish box lock can be had for.
If you don't care whether the gun you buy is a side lock or a box lock, and want a straight stocked 12 gauge SxS with a long stock, and are willing to spend up to $4,000, I have a suggestion for you.
Buy a nice used Spanish box lock off Gun Broker for under $1,000. Spend another $1000 on a spectacular stock blank. And then spend another $1000 - $2000 to have used 12 gauge restocked to your measure using the spectacular stock blank.
