If you want to go electric, the Hangar-9 Apprentice 15e looks nice. It's RTF and comes with a full range Spektrum DX5e 2.4GHz radio system, brushless motor/ESC, and a LiPo battery/charger.

[link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFL2725]Eflite RTF Apprentice 15e Electric Trainer[/link]

If you want to go nitro, I'd recomend getting a trainer ARF and outfit it with the gear of your choice, or maybe try the new Alpha 40 RTF package with the DX5e radio system.

[link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN4400]Hangar-9 RTF Alpha 40 Nitro Trainer[/link]

If you will have an instructor, it's important to note that the cheap RTF electrics like the Super Cub (with the 27MHz radio systems) typically don't have a transmitter with trainer-box capability, so the best an instructor can do is set up the plane for you and maiden it. The DX5e radio in the above RTF packages does have trainer-box capability, so you can fly on a "buddy-box" with your instructor, and extend the life of your trainer plane!