I am considering the Dynamic sold by Costco:

http://www.costco.com/Browse/Product...v=&browse=&s=1

The only real reason is that Costco sells it and they have a very liberal return policy. If anything goes wrong within a reasonable time period (its basically up to the purchaser), I can return it to a store and they will give me my money back. It is like getting an extended warranty for free.