I am looking to buy a network streaming solution. So far, my choice has come down to either the unitilite or the unitiqute 2. I would like to know what is the main difference in terms of sound between the two (and if there is a big difference in terms of features other than the CD). Does the 20 more W make a big difference in terms of bass handling and image definition. I will be driving a pair of B&W 704.