I own a Futaba 4YBF and I like the radio, but I'd have no hesitation about buying the JR Sport system or the Hitec Laser 4 radio system either. The Airtronics VG400 is also nice, but about $15 more than the other three. All of these systems should work equally as well with one another.
If you are just now joining the AMA, you can get a free buddy box for the JR or the Airtronics models when you sign up. You just pay $7.95 for shipping and handling, which is a nice perk:
http://www.modelaircraft.org/promos/1/default.aspx
There really isn't a bad choice at this level.