One of the best things we've ever invested in for our sanity was this little Dyson DC 59 Cordless Vacuum. We love our dogs but hate the extra maintenance we have had because of their continuous shedding of hair.
We have used a larger Dyson vacuum for about twelve years now. We have never had any problems with it. However, we've always hated lugging it out of the closet to do doggy hair touchups. I bought a cheap handheld vacuum once, but it didn't last very long. We had been eyeing the Dyson Motorhead Cordless vacuums for some time, but just didn't want to spend around $400 for another vacuum. On a whim I decided to buy it and try it out. Boy am I glad I did! I couldn't believe how well it picked up the doggy hair on their sofa covers, beds, and blankets! It is also nice because it is cordless. We have had it for about two years now and love it. While it is an expensive vacuum for what we use it for, the sanity it saves us with its ability to remove pet hair fast is well worth it.