As for the lower brace height bows, in my opinion they are a lot more trouble than they're worth in the woods. First, your form has to be just that much better to get them to shoot consistently and it's a not so easy to have that perfect form up in a treestand. Add in the excitement of having a deer in front of you, maybe in a tree that's swaying a bit in the wind, maybe you're cold and tired... Any number of things can make it tough to get your form all sorted out, and you might have to pass up a shot because you don't have time to do it anyway. Second, it's a lot harder to keep the string from raking your forearm, especially when you're wearing your cold weather clothes.

The things I want in any bow, but I consider absolutely a MUST for hunting: Comfortable handle that forces me to take a consistent grip on the bow. Smooth, easy draw cycle. Generous brace height - 7 1/2" and up. Enough mass weight to hold steady, but not so heavy it feels like a boat anchor. Easy to tune and holds tune well. One that will shoot well even when I make a minor error with shooting form - better for point of impact to be an inch off the aim point rather than 6". A riser that isn't so deflexed that it's easy to torque, and I'd much rather have a reflexed riser. Consistent arrow to arrow accuracy - I only get one shot at a deer, but it really helps my confidence when I know that one shot will go where I aim it.

Speed doesn't kill. Accuracy does. So, I have to run down a fairly long list of things that will give me the best chance of putting an arrow where I want it before I ever get to speed. In fact, most of the things I look for in a bow work against givng me blazing arrow speed. If I get 250 fps from a bow, I'm a happy camper.

Speed helps in 3D because you're shooting at unmarked, unknown distances. There are no rules in bowhunting that says you have to shoot at unknown distance and, in fact, I consider it a breach of ethics to take a shot when you aren't reasonably certain of the distance. It's a lot easier to learn the exact distance to the animal than it is to ensure you've got perfect form to take that one shot that counts.

The compound I use most for hunting AND 3D is a Hoyt ProTec. 46" axle to axle, modified round wheels, reflexed riser, 8" brace. 60 pounds pull with 65% let-off and I shoot fingers release with no sights. I get about 245 fps with a 450 grain arrow.