You mean dynasoar rocketry yf-12? Not boyce... I'm the only one who makes a YF-12
If you don't have a transmitter already that tells me that you aren't an experienced RC flyer, which means you shouldn't be trying to fly the yf-12 before you learn to fly some other aileron powered aircraft...if you're just looking to start finding equipment that's great but you really need experience on a trainer and then something that flies about 60 miles an hour with ailerons before you attempt to fly the yf-12.
Given the boost speeds(50-60mph), none are really trainers, however the models like the Orbital Transporter, Aurora Clipper, and Dragonship Six have dihedral in the wings so once in glide mode they are more self stabilizing in roll meaning they tend to stay level. You really need either a person experienced to help with trim flights and boost and learning or get a trainer airplane with ailerons and get comfortable before you ignite an 8 second burn motor that you can't shut off if you make a mistake