"But I'm not sure what ohm/db that would be? Ish??"
So far, the listing of speakers here have a wide variety of these parameters. IMHO, the sensitivity is the main issue and would choose a speaker above 90db for 8 ohms or 93db for 4 ohms. That sensitivity specification is measured with a 2.83v input, so for an 8 ohm speaker, it's 1 watt and for a 4 ohm speaker, it's 2 watts. To make a comparison between those speakers, a 3db adjustment must be made.
So far, the listing of speakers here have a wide variety of these parameters. IMHO, the sensitivity is the main issue and would choose a speaker above 90db for 8 ohms or 93db for 4 ohms. That sensitivity specification is measured with a 2.83v input, so for an 8 ohm speaker, it's 1 watt and for a 4 ohm speaker, it's 2 watts. To make a comparison between those speakers, a 3db adjustment must be made.