I don`t know the Triton, but have heard that people are pleased with it! I use Schulse myself, and I`m really pleased with it, use it daily and have gained full control of all my batteries, LiPo, LiIon, NiCd and NiMh`s

And I have a lot of batteries... Don`t dare to count
Have no idea of what works in a SlowStick, but you sure will get answers to that from others.
The most of the speed-controllers (ESC) will feed your receiver and your servos (max 3 or 4 servoes...) as long as we talk low voltage motorbatteries and the ESC is not of the Opto-type (for brushless motors)
Yes all the battery stuff can be a little complicated in the beginning, but after all there are some simple rules combined with experience which makes it all less complicated as you gain experience. There is in fact one main factor which is the most important; Current/amperes. Don`t load your motor too hard (amperes) and don`t load your batteries behind their specs (amperes).
Beware: Flying is so fun you can be an addict before you know!!!