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!"
I don't see the point of making a remote controlled lawnmower when there are very capable robotic lawnmowers. Robotic lawnmowers go out and mow the lawn without you needing to be around to watch. They come out on a schedule you set and some even program themself based on how fast/slow your grass is growing. Self charging, save, no gas... no brainer. You can research them at http://www.lawnbotts.com