Yeah, i upgraded to Ogres for awhile, but i ran into a problem; either the Orcs\Ogres turned up too early and were unstoppable, or they turned up too late and were mincemeat. I usually go from 'half a dozen wrestlers' to 'twenty kitted out in iron and steel champion wrestler\hammerdwarfs with a dozen crossbow dwarfs for backup' in about two seasons or so, so the spring invasion i'd have to hole up and not poke my head out, and then the winter invasion i'd just jump up and down all over them. Ogres amped it up a bit so it took another year or two to get my forces up to par, but they still suffered from the same problem.
I've been playing around with different monsties, so far i'm having good luck with these Murlocs, which make an excellent first year or two threat and a constant pest to your outdoor dwarfs (plus entertaining war critties) as well as a fun-filled surprise when you crack open the UG water, combined with Hobgoblins (similar to Murlocs, but use wood equipment and siege you really early), while pushing the Orcs and Ogres back later. The Murlocs and Hobgoblins are enough of an early threat to be, well, a threat, but not like an unexpected Orc siege that just mops the floor with your dudes.
Of course, once i work out a flawless way to kill of Ogres riding Beak Dogs (oh god) i'll probably need to upgrade again, maybe to Ettins, or Dragons.