I was thinking of getting a tandem bike- He always pauses to look at them in the bike shop, but then... Where would we put it? Would riding the same bike cause problems? It would be hard to transport if we wanted to do a ride somewhere else.
I also thought about getting him a horseback riding trip- like we had on our honeymoon, but the weather looks to be nasty.
I was going to get him a chocolate fish that says "You're a keeper" (it was panned on here by a woman who got it for Christmas), but the chocolate was poor quality (Palmer brand stuff tastes like wax). 
I will probably get him a piece of junk that he will love. We are going to a hamfest the day before. I will keep an eye out for what interests him. I will try to talk him out of something that he wants then secretly get it for him. We'll see how that works. (Hamfest is a place where husbands by old radio an other electronic junk).