Here's a couple I found that are really small, both 45W RMS. Do I really need more power? How do they compare to what you posted, and which do you think would be best for me?

https://www.crutchfield.com/p_113KAM....html?tp=35782

https://www.crutchfield.com/p_500KTP....html?tp=35782

I need something fairly narrow, probably under 6-7" but length isn't a big issue.