It was a toss up between the 460 and the 660. I didn't like the extra 1.5 lb weight of the 660, or the $200 price jump. I did like the 1 extra HP. Ultimately, I went with the MS460 at 6HP, 15.2 LBS with a wrap handle, a 28" bar, RapidSuperFull-skip chain for $950. I needed a good tree service ground saw for bucking, felling, limbing, and occasionally in the tree for large trunk/crane sections. I also need to take fill the void between a MS390 limbing/bucking ground saw, and a MS880 trunk bucking saw with a 47" bar.
Is there a better choice? The 660?