You can use about anything for electric combat flying from GWS Slowflyers, slope soarers, foamy mid-engine delta wings, etc as long as everyone is using same design/power.
http://www.youtube.com/watch?v=9fCmUxFX6cc
http://www.youtube.com/watch?v=_AI9i...eature=related

Here's a couple less expensive possibilities.

Phase 3 Swoop RTF EP Flying Wing - $100
http://www.nesail.com/detail.php?productID=5292

Hyperflea RTF - $65
http://www.superflyrc.com/HyperFlea/hyperflea.htm

interesting site to checkout a variety of electric planes
http://www.aussiemodelforum.com/Main...ry=2000&page=1