At our club we have a pair of DG1000S, and one has a Cobra single
axle, and the other is a Cobra Double axle. The guy who owns the
double axle, wishes he had bought the single. I use a Saab 9-5 and it
tows just fine. I think Andy summed it up best. One axle is half the
trouble of 2 and you don't need it for load capability.