Greebling asside, I think the neck is too straight. sure it was straight in the low poly model, but that's because they couldn't waist any polys. About the greebles, perhaps you are trying to introduce the wrong kind of design element? Try having a neck made of horizontal\longitudinal beams\greebles that connect the head to the abdomen.
For tubes, since you are using Max, the best way to do them is to draw a spline, and then make the spline renderable in the viewport. Tweak the number of sides. Once you are happy with the shape, convert the spline to editable poly.
Also, don't worry too much about the triangle orientations yet