Omega do a good 'boys toy' watch,the Seamaster,called the James bond watch in the trade,you can get it in three or four sizes from ladies up to large gents,and its available with an automatic movement,or quartz if your budget is a little smaller,it was very popular when I was last in the trade(2 yrs ago) and is a lovely looking watch without being overly masculine and gimmicky,its good points are=
sapphire crystal,srcew down crown(winder)so its very waterproof,high grade stainless steel,(wears very well) And the bracelets are always well constructed and also are good at standing the test of time(sorry no pun intended!) They tend to be a little more classic than TAG whose designs do change a little more frequently,that is not to say TAG watches are no good, some people like the fact thier brand is always changing and evolving styles,other people don't really, its just a matter of taste,horses for courses as the old saying goes!Have a look at their website and see what you think, you may find your partner would not like them and decide to keep looking' I always used to find that its very difficult for other people to buy someone else a watch as a suprise as they are an incredibly personal thing, my best heart felt advice would be-do a little groundwork by picking a couple of styles and brands you think he might like and then take him and let him choose,set it up with a good jeweller who will also 'get in on the act' to make it a special occasion,then have something else planned for the rest of the day and make it a lovely day to remember! He would probably really enjoy it, I think he would really appreciate the trouble you have gone to,and having the luxury of choosing a watch himself is truly not 'copping out',I think it shows your trust in his taste too! Men do like shopping, I think you just have to make it a bit easier for them,bless!!
I'll try to look at some Omega watches.