Personally, I would suggest just buying a recorder as the gift.
Sounds like he's going to be totally new at it so he'll be doing a lot of learning. And he'll have several purposes for his rig, so he's going to want different sets / sorts of mics to use, but only he will know what he's going to want to do with it first.
If it helps, think of microphones as shoes: most of us have -- or at least want -- as many mics as the proverbial woman has shoes. They all have different qualities and prices and uses, but getting him a pair of Birkenstocks when he needs something from Jimmy Choo may wind up not being the best use of the money.
After he gets his gift tell him the best part of the gift is that you've found a website where people are more than willing to help him learn.
Oh, most importantly, thanks to you. Most of us tapers are, well, kinda nerdy -- even though we seem really cool -- and having a SO who 'gets it' is one of the best possible things.