With the champ and the Duet you will be limited to flying only on windless days.
You might consider building one of the FT planes like the FT flyer. You could easily get under $120 there (TX, RX, Power plant and foamboard), and have a pretty penny left over if you play your cards right.
my first 4ch was a dynam "icanfly" RTF. It was $120-$130. It has a small brushless motor and comes with a lipo battery. I had no issues with the plane, other than the weak landing gear that I often had to tweak back into shape. It flew great, and took many nasty landings/crashes and any time it did break it was a easy repair.
^^^yeh, a $35 sim controller with a free flight sim can save you $$$. For some the reflexes come natural...for others there is a tendency to move the control too much and over correct, causing a crash. but $35 and a hour or 2 of time can save you from crashing that $100+ plane.