And if you decide to go with the RAM mount, be sure to use the included glue to glue the rubber grips onto the arms, otherwise they WILL pop off. Also, the rubber band that is included is a surety that your phone will not move a millimeter.
I use the RamMount with the Xgrip, had the phone in the mount last year and went down. I had to replace my helmet, glasses, some chrome. Broke a toe and some road rash but my phone never move an inch. Also I have a RamMount drink holder that didn't even spill my water. I would say RamMount is a good product.