I bought the Husqvarna Z246 that my store sells. Its the cheapest of the three options. Ive never used the other two, so I cant really compare. Im guessing the other two are probably better/nicer mowers in some ways due to their higher price. The Husqvarna does fine for me. It actually pulls stuff better than my lawn tractor did. I am glad I got a 46" rather than a 42". If I got a Toro I'd probably look at their 50". But of course that depends on how big your mowing area is.
I've only had it for one season. I guess the true measure of a machine is how long it lasts, what it looks like 10 years from now. So the verdict is still out on that. The Husq certainly isnt as heavy as the Hustler, but for a homeowner using once a week on a well kept yard, Im not sure thats an important factor. One complaint is that the ride is kinda bumpy. I guess thats due to mowing at a faster speed and you dont have 4 big tires like a lawn tractor.