I'll give you this - it's almost certainly the best *bagless* vacuum you can get in the USA unless you count such things as Filter Queen.
But yeah, for bagged, you can get Sanitaire, Riccar/Simplicity/Maytag and Royal, which I'd choose over the DC65, especially for the price. I'll grant that the Dyson's tools are more convenient than the Royal's, and that it's pretty maneuverable, though.
As to what, specifically, I don't like about Dysons? Well, other than the usual bagless problems - which, admittedly, Dyson does better on than most - I find the build quality isn't up to what it should be at the price, and the agitation is singularly unimpressive. As an experiment, try this - on a short-pile carpet, pour out a thick line of sand. Take a Dyson, and another high-end vacuum: when I tried it the other was a Simplicity Moxie canister. Turn them on and start the brush, then move them toward the sand. The Dyson has to get mighty close before the sand starts vibrating and moving toward the nozzle. The Simplicity, OTOH, makes it dance from quite a ways off, even if it's settled into the pile.
Agitation, airflow and suction, in that order, are what cleans carpets. Dyson has the last two, but falls flat on the first. I will admit some of them do a bang-up job on surface pet hair, though (but then, so do Simplicities!)