Wow. This thread got a little heated. I don't think there is anything wrong with someone calling a machine junk. It is just their opinion, and it is about a machine, not a person on this forum.
I thought that the Oreck/Halo merger was going to result in a machine that looked like an Oreck, but that just had the UV light underneath. I was a LITTLE shocked to see that it's still a "Halo", but just in a different color. Halo must have had lots of machines in stock to unload before the merger. It doesn't surprise me though... Good ol' Dave always uses other designs and calls them his own... he's not really invented anything.
Now that I've had my Oreck for over a month, I think I can comment on it. My Oreck is pretty loud, and not very powerful. It does pick up better since I bought a new brushroll for it (and an aftermarket brushroll was better quality than an original... the belt pulley was metal instead of plastic). My Oreck actually has a CHANGE in motor pitch as the motor bogs down when I go over surface litter (like cat litter). I watched the Oreck demo on HSN.COM and noticed the same thing! It takes more than one pass to pick up powder on very flat pile carpet. I enjoy having it as a member of my collection, but I would not use it as a daily driver or expect stellar performance from it.
I've had my Dyson DC14 since last May. I bought a used machine, and even though that model is my least favorite Dyson (I'd even prefer a DC07), it seems to perform OK. Of course it took me a month to get rid of the dog smell, but I only paid 100 bucks for it used... I wouldn't pay a new price for one (unless they ever make that self-propelled I've heard rumors about, then I might just "need" it). My does have a problem with the clutch system... every now and then it will click when I'm using it. It doesn't seem to affect performance though... just annoying sound. If the belt ever goes, I will not fix the clutch. I will just throw the machine in the garbage and get a different model. As a collector, I don't like bagless because there's no bag to inflate or puff out. Plus it's messy. However, if I were going to have any bagless, Dyson would be the one. So much better than the machines with the filters inside. Easy to use tools and decent suction as well. Sometimes, I like seeing what was in the floor, and for that I'll use the Dyson. What I don't understand is why so many people actually hate Dyson. It's not perfect, but really, there are a LOT worse choices in the vacuum world... especially bagless.