Dumbbell sets

I am looking to buy a dumbbell set for the house. I am normally at the gym 5-6 days a week but on weeks like this I will be out for more tha 5 days and I am going crazy wanting to do some weight triaining at home. I have been looking at the CAP adjustable sets and was wondering if anyone out there has these at home and what you think about them? Is there a better system? I am looking for something that is inexpensive. I would love to have the bowflex adjustable weights but they are way out of my price range.