well you need to be careful , in the ARf vs RTF we are also all assuming your purchasing from Horizon (a great company ) howvere there are a ton of knocks on ebay of trainers all the way to to he ducted fans jets . THe radios , the engines and the batterys are toys . Advoid them at all cost because you will spend your time upgrading if its even possible .
Hobby Lobby is another good source of RTF but ask them questions about the plane your interested in and if there video is stock or modified .Many time they will shoot video with a modified with hop ups , so make no assumtions