Welcome.
If you take the plunge and build one of Danny's kits, you will not be disappointed.
I've been an audiophile for 45+ years and have owned some pretty high-end systems (all relative, but think high-end german luxury sedan cost). I hadn't tried building my own speakers since college in the 70's. About a year ago, I decided to give Danny's NX-Oticas with servo subs a try.
Wow! Grin from ear to ear right from the get-go. And they only got better with some hours on them.
I expect that anything Danny offers will provide amazing bang for the buck, and the immense satisfaction of having built it yourself.