I've had a Delphi MyFi, Roady II, and now have an Inno 2. I liked the Delphi most as it had a big screen, and big buttons to change stations.
None of these are water tolerant in any way so I always carried a zip bag to put over the unit at the first signs of rain [sometimes at the expense of getting wet

].
Some of these units come complete with home and car mount kits and that can save you some money. All work about the same and need a clear view of the sky to get good reception. Some have recording features that can be a benefit when canyon carving or under the trees. I don't think the MyFi or Roady are being produced but I've seen refurbished units around the web.