ooohh... I like that idea a lot better. Retain the 6x6 and delete that trapezoidal sponson dealie...yes, very cool! Are those concepts photoshop mash-ups, or is there artwork involved? I really like that concept a lot!
Incidentally, the upper hull of a Trumpeter AVGP is *exactly* the same width as the Academy M-113 hull....and, the angle of the rear hull plate of both appears to be a perfect match too...and, the width of the M-113 ramp 'hump' fits exacty under the AVGP rear roof width.