Well from my experience, the fatties would benefit your riding style the most out of all those pipes you mentioned. You will gain plenty of top-end with them, not as much as the others but you won't sacrifice any low to mid like you will with the other pipes. Believe me, the fatties are a great all around pipe for just about anything. They flat out rip and sound great also. The only downfall of the pipe is their finish. They tend to rust over time and need extra care and attention.
The T5 and T6 are both great pipes, differences are subtle with a slight gain in top end with the T6. This is on a stock ported motor though. If you plan on porting then go with the T5's. Fatties also work great with porting as well as the rockets.
For lugging around hills and stop and go riding the fatties will be the best. The other pipes will require some timing advance and higher compression to maintain the low to mid the fatties will provide. Though the fatties will never have the top end that these pipes can provide. So it's a give and take and the decision is yours. It's never an easy one and I wish that we could have it all. Also if you decide on a top end pipe, take a look at Trinity's. They are costly but you can get a BHQ member discount through rocketpig. I can't say enough good things about that pipe, but you will be in the same boat as the toomey's or rockets for low to mid.