I have the CEN, XTM X-Factor 2, XTM Mammoth ST, Traxxas electric Stampede.
I would have to say the CEN is my all out favorite. They are all different and suit different purposes. But if I had to keep just one it would be the CEN.

The X-Factor is a nitro rock crawler that has been re-geared lower, 17mm hubs, LST tires with Romulin wheels, 290 cc fuel tank, and some other mods to help with reliability and articulation.
The Stampede has steel tranny gears, aluminum shocks, LRP speed controler, 15 turn motor, Masher 2000 tires, full ball bearings. This thing does close to 40 mph.
The Mammoth ST is still stock and still in the break-in process but it is going to get aluminum arms (the stock ones are lowsy), center diff, 290cc fuel tank, digital steering servo, aluminum clutch shoes, and a JP1 pipe.


The GS is a really good truck you won't be disappointed.


rolland