Ultimate DIY speaker design?

Hey everyone,

I've got the bug to build a set of DIY speakers, I havent built a set in years.

Is there an ultimate design out there that anyone can recomment?

I saw the WATT Puppy designs out there but I am wondering what else I might consider trying.

Note, I definitely dont want a kit, I wouldn't mind doing a custom design I come up with myself but I would ideally like to try a clone of something with top pedigree.

Thanks in advance!