[arpad_m]

Since my phone just barely, but fits the wireless charging pad, I prefer to use that, next choice is cupholder (because I tend to leave the phone in the car when it's on the charging pad, out of sight, out of mind—just in case a GM car ergonomy expert reads this, heh). I bought an additional rubber insert for the pad and will trim the protruding center ribs on all four sides, that way it'll fit larger phones as well.

That magnetic cigarette lighter mount copper3000 linked looks very promising, though, it has everything (wireless charging, magnetic pad, USB receptacle).