RE: 4* question
You may want to check out Futabas 6 exa. It is cheaper than the one you posted and it has more model memory. The rest looks about the same.
[link=http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=6exa&FVPROFIL=++]Futaba 6EXA[/link]