Jet.com and Walmart.com both sell the Strongback Elite. If you buy it from Walmart.com, you can return it to a store if you don't like it.
That being said, it seems like a lot of money for a camping chair. We bought a pair of
Zero Gravity chairs from Gander Mountain online. We have a Gander Mountain about an hour away, but shipping was free. I think we paid $69.99 each 3 years ago. They will handle 350 lbs and are very comfortable. They are a little bulky to carry around, but if you are looking for a camp chair, it can't be beat. I have yet to find a zero gravity chair in the same price range that is better.
Ours get used a lot. We camp seasonally, so they are used all summer long. They get wet and the sun beats on them about 6 hours each day. The fabric has faded, but the chairs are still solid. I take mine everywhere, the beach, kids' sporting events, etc. For folks the size of you and your partner, they will be very comfortable.
-Michael