I think the Savage Flux HP would be better than the one mentioned.[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXZJE2&P=ML]Savage Flux HP[/link]

But since you want a kit, check out [link=http://ofna.com/kits.php]Ofna.com[/link]
For buggies. check out the Hyper 9e or NEXX 8. I hear they are pretty sweet. Especially the Hyper, that series has been around for awhile.

You can also check out [link=http://teamassociated.com/]TeamAssociated.com[/link]

If your not on a tight budget, then check out these for power systems:
[link=http://www.castlecreations.com/]Castle Creations[/link]
[link=http://www.teamnovak.com/]Team Novak[/link]
[link=http://www.teamtekin.com/]Team Tekin[/link]

If you are on a tight budget check out these for power systems, cheap radio systems, servos, lipos, and chargers:
[link=http://www.hobbypartz.com/]HobbyPartz.com[/link]
[link=http://hobbyking.com/hobbyking/store/uh_index.asp]HobbyKing.com[/link]

Check out these for radio systems:
[link=http://www.futaba-rc.com/radios/]Futaba[/link]
[link=http://www.spektrumrc.com/]Spektrum[/link] which also has good servos too.

Check these out for servos:
[link=http://www.jrradios.com/]JR[/link] Which also happens to have radios.
[link=http://www.hitecrcd.com/]Hitech[/link] Which looks like they also have a bunch of other stuff as well.

Take plenty of time to think, then let us know what you want. There is far more options than what I'm telling you, so browse thoroughly.