I have never heard of Calumet, and have no experience with AlienBees (as I don't live in the States), but I have the Elinchrom D-lite 4 set and I'd recommend them. They deliver all I want, with a very high degree of control.
My only gripe is that the softboxes are a bit of a struggle to set up, getting the supporting struts into their holes, and the fabric is a little bit weak. I've had to put reinforcing tape on some of the seams which started to tear.
Apart from that ... great!