it's a tough decision for a newbie. i decided to start with a DX6 after wasting a lot of money on 4 rtf's learning about the hobby.
you don't know if you're going to enjoy it, or how deep you'll wind up going down the rabbit hole.
while many try to make economical decisions, the longer they are in the hobby, the more transmitters they seem to accumulate.
the learning curve is so steep on these things (at least for me) i shied away from open tx and went with spektrum.
and even that is difficult for me.