Thanks for all your input. After much research, I purchased a brand new Echo CS-490 with 18" bar.
The dealer put the fluids in and I brought it home, tightened the chain, pulled it twice, and it fired up.
I put it through a mild workout and it performed well. It should serve my needs just fine.
Few questions from a chainsaw rookie:
1. This one has the 18" bar, but actual length is 17.5"...I assume this is normal.
2. The chain loosened up after I used it. I take it that is normal initial chain stretch? The need to adjust it will decrease as I use it?
3. Engine break in - Is it recommended to take it easy for the first few tanks of fuel or run it hard from the beginning?