Let the hive mind of Engadget get that for you.
"I finally got a new laptop with a lone USB 3.0 port. I'm now looking at getting a USB 3.0 hub with a power adapter so I can use both of my USB 3.0 hard drives at faster speeds. I've read lots of horror stories where some hubs either don't come with power adapters -- and as a consequence the portable drives don't work with them properly -- or they are designed poorly which results in USB 2.0 speeds. Or, the hard drives keep getting disconnected. Do your readers have any suggestions or experience using USB 3.0 hubs? Thanks!"
There are a lot of trade offs between the two devices. The iPod has a lot of pros and cons. The Zune has them as well. But battery life is one con that many people won't accept. 12 hours is horrable by anyone's standard. I mean yah sure its not 3 hours but now a days 15-20 hours is pretty much the standard.