Good luck on your search for a used one. I am one of those that really like the smaller size chain and bar on the 150. It makes a very smooth and clean cut and dramatically reduces the amount of sawdust produced which is a good indicator of how much it is reducing the load on the saw.
If you eventually feel that you need more power, look up how to mod it. Either way, the 150 is a great little saw.
If you eventually feel that you need more power, look up how to mod it. Either way, the 150 is a great little saw.