My position is that I believe God is the first mover.
I think God is un-caused, and always existed.
For me this solves the problem. For me, the real infinite regression is that of things being continually caused. Then you have the question, "what caused the first cause".
An infinite series of caused events, though, would be itself uncaused; therefore you'd need no "first cause." An an infinite uncaused series is no less logical than an infinite uncaused God. Plus, it solves the problem of "if God is required as a prime mover, then how come there's no God?"