Just to throw another wrinkle in the mix..

Don't forget the Tower discount codes when thinking about your radio (that is if you plan to buy from tower.)
Right now they have a 25 off $150 on the main page code 010KY

The 4ch Skysport is $119 w 4 servos
The 4EXA is $149 w 4 servos but after the discount it's $125.. Spend $5 more and get a computer radio? Yeah I can handle that..
It has 4 model memory

Or spend $35 more than the skyport and get a 6EXA for $155 after discount.
It has 6 model memory and can do PCM if you wanted to upgrade recievers later.

Or better yet $85 more than the skysport will get for a 7C for $205!
10 model memory, way more programing options and can go PCM.

All these radios come with the R127DF reciever so if you can't get a 7C today you could always get a 4 or 6EXA then upgrade later..

Personaly I'd go for the 7C or if $$ is a bit tight get the 6EXA.. At a minimum get the 4EXA.. You'll never miss the extra $5!

Oh yeah.. when it comes to adding that 2nd or 3rd plane..

Oh yeah.. Why bother with the flight packs at $119 when you can get a whole new radio kit for $15 more then keep the extra TX for a buddy box or SIM controler.. or just sell it to some guy who needs an upgraded Tx.