TD's have their advantages. Getting different lenght/weight/configuration limbs is a big plus. I'm in the process of buying a set of LB limbs for my Zipper TD. If you have a 29" draw, I would be looking at a 62" or better bow. I have a 29" draw (on some days...) and find that I sqeeze all the performance out of a 60" bow has to offer. My 50# Snakebit is a 64" TD and I still get around 200fps with a 30" GT arrow.
The number one thing is how do you shoot a given bow. Regardless if it's a TD or one piece, how a bow feels to you is paramount. If a bow feels good to you, you will shoot it well. This can only be done thru trial and error. My suggestion is get and use a beater bow untill you can get to one of the major shoots this spring/summer. Unless you have a unlimited supply of $$$, get to a shoot, find the draw weight you are comfortable with (can't overstate DO NOT OVER BOW YOURSELF...) and go from there. The more you shoot, the more you'll find what works for you. Heck, you may prefer a LB over a curve and then you'll have to change your handle...
Whatever you choose, remember to take your time, learn from your mistake's and keep it fun.
Welcome aboard!