There are 2 6EXS systems offered by Tower. If you get this one
http://www2.towerhobbies.com/cgi-bin...&I=LXKAJ1**&P=
you get a mini RX and micro servos. The servos would probably be marginally OK but the RX in this package is for park flyers and is recommended for 650 ft range or less.
http://www2.towerhobbies.com/cgi-bin...?&I=LXJSP9&P=V

The other system
http://www2.towerhobbies.com/cgi-bin...&I=LXHYK7**&P=
has a standard RX and standard servos with a bit more power. If the servos in this system will fit your plane I'd go with it.