I 2nd or third the CS-400 or even a CS-370. I have a CS-370 with about a zillion hours on it and it's been flawless. Not overly fast, but PLENTY of grunt for 37cc and dead solid reliable in long term service. We even take it with us on or annual Colorado Elk hunting trip and it does a good job at 10,000-12,000' as our camp saw.
Another small limbing saw to add to the list is the Echo CS-490. Remarkably compact/light weight for a 50cc saw and lots of professional features, plus pretty inexpensive. With a 16" bar it woln't weight much more than many of the saws mentioned and have considerably more power.......Cliff