Tell him how much you love him , personally that would make my best birthday present. If you give as an idea of what he's interested in we can progress , but with millions of products on the markets for all different types of people , it's hard to say.
Champagne/wine, at an expensive 4/5 star hotel room, limitless room service and lots of lovely sex.
Personally, I'd prefer to receive a gift that required emotional investment. A car or a weekend in a nice hotel would be awesome, but something like a poem or a painting or a mix CD or whatever by my girlfriend, to me, however awful, would be much more special.
You could make blow job coupons, that would be nice.
order him the new Man city T-shirt
whats a nice watch for guys? around max 100 pounds?