I bought it!! I got it for $380 and I'm happy with that. It's one of the earlier 6600's as opposed to a later one. It's heavy!! Looks like there's a lot to learn so I'm sure I'll have questions. Yup, there's no difference between the 6600 and 6600P. When I was looking at it, the word "professional" had the price sticker on it so I didn't see that.