I went back to Dyson website. The DC44 is 3rd in line. It weighs a little more than the DC59 which is the top of the line, (i.e. 4.6 vs 5.07 lbs).
I couldn't find the power of the motor of the one QVC sells, but it is also called "Animal" as is the top of the line.
I once tried out the stick and since all of my floors are carpeted, I got tired of trying to use the stick. My guess it was the DC44, I don't remember.
I think I might buy it for one of my daughters. They both have Dysons (one the ball and one the Gray one) and they all have all wood floors.
The daughter with the Gray one has had her's worked on (forget the problem) but it didn't cost her a penny, was done quickly and she loves her Dyson.