I appreciate your enthusiasm, but you have to learn to walk before you run. Chances are you will change setups many times, so trying to buy what you think you will be shooting in the future is simply not going to work. A good idea would be to buy an Axiom Ocularis from Simple Shot. That way you can try bands and tubes in both OTT and TTF, all with one frame. Buy a few of their pre-made band/tube setups to get you started. You can chat with them and they will recommend a good choice of bands and ammo. Play with that for a few weeks, or even months. See what you end up liking the best and then work your way into other frames and hunting setups. Good luck and have fun!