See several, if I was 42 instead of 62, I would consider the Prowler...........it's versatile, does'nt need a big van, or a return tank. The CFR is an excellent machine, but you will either love it, or hate it, there are several decent twin vac portables around and a fascinating article was published recently which showed the difference between truckmounts and portables, particularly with vacs in parallel is less than assumed.
Try to get around as many as you possibly can and don't rule out any, you have to find something YOU can operate and manhandle with reasonable ease.