Well I did it. Ordered a psr s670 demo from Sweetwater today. All of the posts by all of you here convinced me I didn't need the 975. I have tc helicon I got a while back from Don M so I don't need that feature. Main things that sold me was the better styles and the classic guitar sound. I'm heavy into country so really wanted the better guitar sound. I'm of course hoping for overall better sound quality than I'm getting now from my 740 & 3000. I expect to get it next week b4 my birthday. Had to make a deal & get the wife a trip to NC to visit her sister but what the heck, I was going to have to do that anyway!
Good luck with it..a very wise choice.