Dyson Vacuums: Are They Worth It?

I have the opportunity to get a Dyson vacuum with a partner discount. This basically amounts to any model at 50% off MSRP. I was looking at the DC24 All Floor model, which would be $200. On paper, it seems like a good deal, but it's still $200 on a vacuum! We have had dirt devils and eurekas, and they start out ok but after a year or two just crap out. I guess I am worried about the Dyson doing the same. I have seen reviews, but not really anything that wasn't reviewing the BRAND NEW product. Has anyone had one of these for maybe a year or two that can give me some input?
Another few things. I am picking the DC24 because it is more compact and lighter (just 12 pounds). We have dogs, but from what I read the only difference in the "animal" version is the hose attachment (for couched and upholstery), which can be purchased separately if I decide I need it. The color is also different (yellow versus purple), but I don't care.
Going the next model up (DC25) gets you a bigger bin (the container all the waste goes in), and the ability to vacuum larger spills (an example I read was jelly beans or dog food). This can be done with the hose attachment though.
The top of the line model, the DC28, is all of the above, plus some fancy name for what is basically automatically driven, so there is virtually no pushing and pulling involved since the vacuum does it for you.
If the perks I listed are literally the only perks, I can certainly be happy with the DC24. The question is, how long will it last? Will one model last longer than the other (ie will the DC25 be a better investment in the long run than the 24)?
Any help would be appreciated.
Of course, if you think the product is junk, you are welcome to make lite of that. I do ask that you keep costs in consideration. If you recommend me another vacuum that retails for as much or more than the dyson retails for, I am essentially priced out of it. Remember I am only really considering this because of the 50% retail price.