these are gorgeous ! congrats on a truely great find.
i am no expert though but they definitely look valuable.
did you call an auction room or two to see if they could value them for you ? i think they offer this type of service, send a pic and they'll tell you how much it's worth type thing...
i would personnally go for the traditionnal sand and varnish route and nice seating refurb , but i guess this is totally up to you, it depends if you like brown furniture and if you would like this type of furniture in the house i guess (everyone's different)
at the end of the day, you will be the one using them, so you will be looking at them every day...
good luck with the project !