In my experience I have own a few kits so here's MY humble opinion on the companies I've dealt with....
MAPEX - A+ (My current kit, 1st from this company...)
I called them just to go over my "warranty" they were VERY helpful and patient and even sent me some swag just for having verified my purchase of their product...... I didnt get my free snare from the store (didnt know about it....)
so THEY SENT IT TO ME DIRECT... GOTTA LUV EM!!!!!!!
YAMAHA - C (4 different kits.....)
Great drums, but not so good service if something ever goes wrong with your kit. I had a new lug casing strip out on me, and not only did it take forever to get a person on the phone, they gave me such a hard time about it..... Nobody's perfect though...
GRETSCH B+ (1 Kit...)
Again Great drums but not so good service if you need to call them directly....
PEARL - A+ ( 2 kits....)
I rank them right up there with Mapex. When I bought a Session series and needed a replacement part for the snare, it was almost TOO EASY.... I still reminisce on it from time to time....
Remember you have to judge it for yourself, this is what I EXPERIENCED .......