I'm a middle of the road kind of gal, and thus, I'd do both-- a split stay.
Instead of 7 or 12 days, I'd stay for 10-- 5 at the value and 5 at the moderate. Your numbers may or may not be pretty similar than if you were to do just one or the other. You could adjust to compensate as well, like if it puts you over budget, do 6 days value, 4 days mod, or vice versa if you're under budget.
That way you get the best of both worlds and a fabulous 10 day stay! Good luck with your choice.