The oz v’hadar mesivta shas set is, as WIY said really, really big! You will need lots of shelves to make room for this set, but if your husband wants clear printing and a lot of extra mefarshim you should go for it. It is fairly affordable, listed at around $850 at the site I checked.
Personally, I love the Nehardea shas set (by moznaim). I saw it listed at $785. It comes in 22 volumes and is very user-friendly.