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Sig is also an excellent choice, but don't put it to your face !

I have both Dovo and R. Aust, and personally feel the Aust, for the money, is 1) a better shaver, and 2) has better fit and finish....

JMO, but if it was me, and they're in stock I'd pick the Ralf Aust over the Dovo.

On the size question, lots of folks start with a 5/8. It's a little easier to maneuver when learning, although...