Ah, what you are describing is the early onset of CAD
We all suffer from it, and want saws we dont "need".
I have a few 180s, they are a great saw for their size.I got mine second hand, and needing some work, but they are good now, and if you spend a day cutting with them, you dont feel worn out like you do if you have been using a 660 all day on larger trees.
Keep your chains sharp, filters clean, and keep the cylinder fins clear of bits, and remove the clutch cover and give that a good dust off, thats daily stuff.
Depending on use, I take the recoil starter covers off, and give the flywheel, and coil area a good clean. And take the inner covers off the clutch area and clean that area out too.
If you do blast it with water, make sure you run it and warm it up ensure its all dry.
Trouble is, you cut with the 180, then one day, your cutting something larger, and think, if I had a larger saw, I would cut thru this size piece much quicker, would be easier on the saw etc etc etc.
Then you get a larger saw, and start tackling larger timber you would pass by before, then you think, If I had larger saw, I could cut thru this size piece much quicker and it would give the saw an easier time and I could cut up that larger tree over there that I currently pass by.
Then you start getting longer bars, and after a while, you think to yourself, I could cut faster with a larger saw, and then your cutting timber you cant lift or move, and think, if I had a tractor, I could move this timber, and then you need a larger trailer, or truck to move larger pieces, and I forgot to mention earlier that you start cutting sized bits you cant split anymore by hand, so you get a hydraulic splitter, and lifting table, and conveyor etc etc etc.
Its a slippery slope, get out now before its too late.