Ram mounts. I didn't take the advice, I spent $10 here, and $15 here and $20 there, trying to find a good, cheap mount. Probably bought 4 mounts before I sucked it up and bought the Ram Mount for $55. Seems expensive, but everything else is junk in comparison, seriously.
www.rammounts.com
Also sold elsewhere like Amazon, but with less customization options on the arms and such.
Really, if you want a good mount, save yourself the time, money, and headache, and just buy the gold standard mount first.