Get the MS170 if you don't need a top handle saw. The MS192 is a rip-off (as is the MS200). Find yourself an Echo CS-341 for dead solid reliable top handle saw and a CS-360 if you want a more modern, speedier saw - which I think there is a thread on this site saying they might be marked down in price to make way for a new - likely cleaner EPA version.
Good luck,
Bill
Good luck,
Bill