Hey petersenj20,
The 660...it's a mighty powerful saw right-out-of-the-box, and a simple muffler mod makes a great saw an AWESOME saw. For cutting big wood, it's really hard to beat...it's got the grunt, but also has fast chain speed. For an all-around big-wood saw it has a lot of power without the wieght of the 880. It's a big saw, and you should have a fair amount of experience in cutting to be confident with it. But when that big saw is deep in a cut, throwing chips to the ###### moon, it's feeling you will learn to LOOOOOOOVE!
OK, the 880 has torque...there's 121cc packing in there...but with a limited coil it will generally not cut faster than a 660 in moderate to big wood (18" - 36"). If you need to cut huge timber regularly (48" and up) then the 880 starts to make sense. But then an 880 with a long bar can exceed 50 pounds, and that's hard to muscle all day. We have a modified, ported, "Snellerized" 880 in our fleet, and it is monsterously powerful...not for the faint of heart or weak of arm. This big gun will only come out when the timber exceeds 36" and there is a bunch of it to cut. Or, sometimes, we just want to shake the windows in houses a mile away...yeah, it's just plain fun-to-run, with a distinctive roar at wide-open-throttle and a unique lumpy idle.
Which one would i get?
The 660 all the way, baby. Get one, run it...you will know what i mean...:msp_thumbsup: