Xheli.com
Xheli is where I got my start in RC helicopters. It is a good place to get some 3 and 4 channel helicopters when you are first starting out. They just started carrying Thunder Tiger and Some Align stuff too so they have both cheap and ‘toyish’ all the way to professional level machines. I suppose some time back they had a CS issue but I have never had a problem here.

HorizonHobby.com
Horizon is the home to the ever so popular helicopter brand E-Flite. E-Flite is the manufacturer for the Blade mCX, mSR, SR, and Blade 400 Helicopters which all come in a Ready-to-Fly and Bind-and-Fly modes. It is also the main distributor of JR/Spektrum Radios, servos, receivers, and gyros. They also have superior customer service and will call you back!

RonLund.com
This is also known as Ron’s Heliproz South. Nothing but fantastic customer service and it is one of the two places I have found that sell the Cypher 3D and full parts support. If you call them the people there know what they are talking about and are happy to help. Find Synergy, Hirobo, Miniature Aircraft, Century, JR, E-Flite, Kyosho, Pantera, Thunder Tiger& Align kits and parts here.

AMainHobbies.com
These guys sell cars, trucks, airplanes and heli’s. They also sell swag products. And have a ‘scratch and dent section. Protek RC products are here. Along with E-flite and Align you can find the unique MSH, Compass, Kyosho, Avant, Thunder Tiger, JS Models, Outrage, Curtis Youngblood, Beam, Heli-Max & Ely-Q models here. This is also a good place to get bearings.

ReadyHeli.com
Good customer service and they want you to write a review of what you bought so you are helping your next heli comrade on what to get. They also sell MSH, E-Flite, JR, Mikado, NextD, & Kasama Heli kits and parts.

HobbyPeople.net
These folks are where I got both of my Cypher 3D kits because they were on super special there. They also have a lot of Heli-Max and some Walkera heli’s

TowerHobbies.com
This is a big hobby site and they send out catalogs! They sell a lot of Futaba gear and a lot of airplane stuff. They are a big distributor of Heli-Max helicopters along with some Centruy, Revell and Venom. If you can’t find some hobby accessory anywhere else they likely have it. Also they have a neat ‘pay in three installments’ which can help those of us that are not flushed with cash.