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Which Shoei? I did the same.. EXO-700 to a Shoei Quest. Some things I like better (interior padding is more comfortable, I think the venting is better, helmet is waaaay quieter on the highway), some things I don't (fogs like a mo-fo, liner is not fully removable and a PITA to route speakers from the intercom).
I'm starting to think that there is no such thing as a perfect helmet.
That said, the EXO-700 is pretty good. I'd buy another too. Somehow I got sucked into the "what's your head worth" argument and felt I should spend more on a premium brand (Shoei).