I'd get the tx for sure so you can at least have something that'll reliably work, not knocking on the old FM stuff because I used it up until a year ago with great success, it's just being able to program different models, rates, and reverse without getting out the little screwdriver to flip the dip switches it a definite plus. Granted, if you had a radio like a 7c or a 9c futaba I'd say keep it and get the plane because those are rock solid txs, but I'd say in your possession, the tx is the way to go. Not to mention that the airplane your looking at may or may not fly/work, seeing that it's a used scratch built with a shotty tx in my opinion. So I'd just get the hitec and I have a feeling that you'll be happy.