Thanks for all the replies. I realized after I sent the question I didn't send enough info...rookie mistake.
I own 25 wooded acres. Most of my cutting will be for a couple cords of firewood a year and would be comprised of 12-18" soft maple with an occasional oak up to 24" couple with some crop tree releasing of various sizes. But now that I have the desire to mill a log or two to make some stuff for around the house, my 026 needs a big brother. A bigger saw would also make cutting up some of the bigger trees quicker as well, of course.
Right now I'm forseeing to mill nothing larger than 24". I know I would be better off with the 660 for any milling activity but didn't know if its really necessary for the amount I plan on doing. But like BobL says...."that's what they all say."
SO, from the responses and what I'm currently planning, I'm on the bubble for saw size. But since I do love "snorting a mix of saw chips and two stroke fumes", I guess I have to go with the 660. Thanks.
BTW Neotree, I live in Stow with property in Hiram. You??