Speakers and Impedance ??

I have a Boogie 60W SOB with the typical speaker jacks: 8 + 4 + 4

Which of these scenarios will be better:
- Use a 4 ohm speaker as my main speaker. Add a 16 ohm speaker if I want to run two speakers.
- Use a 16 ohm speaker as my main speaker. Add another 16 ohm speaker if I want to run two speakers.
- Get a different speaker, because these won't work well

Let me know what you think, and where I would plug them in. They are all Weber California 12" speakers - a modern take on the JBL - in their own 112 cabs.

Whatever you do, I would get speakers with matching impedance ratings. The easiest would be two 8 ohms, and use the 4 ohm jacks. However, if you have two 16 ohms, use the 8 ohm jack connected to a Y box. This is the recommendation in the Mark I Reissue Owner’s Manual:
https://mesa-boogie.imgix.net/media/User Manuals/Mark1 Reissue.pdf

Thank you! That's exactly the info I was looking for.

I bought these speakers to go with another amp (Vintage 40s Masco PA) and they didn't work - too bright and unforgiving. But they sound great with the Boogie, whose Black Shadow wasn't sparkly enough for me. And the Black Shadow works with the other amp, so win/win.