Yeah, you're right. Pushed in faces are not a good idea for tropical climates. I just had a bit of a read and the recommendation for those climates seems to pretty much be lean frame, longer nose and not too much hair. So it may be better to investigate your 'running dog' options.
Or a giant Schnauzer? Probably totally not your type, but I've met a couple and thought they seemed like fun dogs. But they also have the reputation of being quite stubborn, I believe.
Rhodesian Ridgeback? They're pretty laid-back dogs, quite big but not massive, very short coat, long noses... Originallly bred to hunt lions in Africa, so well suited to warm climates, I would think. They don't require heaps of excercise and I think they're fairly easy to train. Kind of middle of the range as far as intelligence goes. (I had a ridgeback x staghound and have known a few other ridgback crosses and one purebred one)
But seriously, read up on training first. It seems an overwhelming task until you get your head round the basic principles and then it becomes much less daunting. But it is the one thing that usually decides whether someone keeps a dog forever or not.