my first Leica was the original Q. Then I got the Q2, never liked it as much as the Q. Then I got the M10 and fell in love with Leica, after that bought a few Leica lenses and went to town. I sold the M10 when I got the M11P and M11M, and regretted it. I think the M10 is perfection. Plus I think (but am not positive) that the M10 and the original Q have the same sensor.
If you're ready to go with manual focus, then it's a no-brainer. But truly you need to be sure that you're ready to give up AF.