Ok... let me first remove giant scale planes from what I'm about to talk about... I don't follow them well enough for anything I say here to apply to them as well... though these companies do also have some giant scale planes available.
If you visit the RCG electic plane -> 3D Flying forum areas... you'll see three companies talked about almost all of the time... they are 3D HobbyShop, Extreme Flight and Precision Aerobatics.
In the USA, PA has a terrible reputation for customer support so it isn't talked about as much, still they make top quality airframes. They excel more in very light 3D probably but they have some faster airframes. In other countries they have a good customer support... so really the only issue is in the US and if you purchase from one of the vendors, you'll bypass many of the CS issues that are reported about PA-USA itself.
3DHS and EF are US based companies that provide top quality airframes and probably more importantly, their customer support is second to none. Because of their quality and their CS, they often have trouble keeping their products in stock.
A typical post about either companies products are from the customers that say things like "after I crashed, I fully expect to come up to the plane and find nothing but pieces... and there was nothing broken ( or almost nothing )"... They also rave about the flight characteristics when compared to other companies products... So not all Edge 540's ( or Extra 300 etc ) are the same when you actually fly one... If you also select to go with the recommended equipment... there are no suprises, it just works as expected.
When a newbie comes into the forum area and ask which one to choose... the other guys say look at each brand.. pick what you like the looks of from either company and you won't be disappointed.