I go by...
1. Have I heard it and like it, with amplification I’m familiar with?
2. Looks, do I think it looks good?
3. Porting and placement, where will it (can it) go?
4. Specs last for me.
I have worried in the past about recommended watts/RMS before regarding speakers but haven’t been disappointed when I’ve kinda pushed the limits of a few speakers I have.
Happy hunting and good luck!