go for the 51'' slick, it handles the wind great. It has to be the best flying plane I have. At least the ones i have flown, I am weight for a 57 extra to get here so that might take number one.
If the cost of the first plane is no factor, the 51" Slick is great... But the 48" Edge is a much less expensive first airplane
the 48'' edge is not the best plane, you would be better off with the 47 extra. The edge has to be the only plane from 3dhs I am not pleased with.
what is the differences? what are the issues you have with the edge, especially for a 3d noob.
not only does cost come in alil bit but strength and durability. after thinking about what gyro said, may wanna go with something alil less $$$$ with my experience and all. hate to pile up a $600+ plane hehe.