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!
idfnl
I'd like to see a home subwoofer based on these dudes.
http://www.mtx.com/caraudio/products/subwoofers/jackHammer.cfm
I like extreem stuff like this.The proplem with this hooby is most products have become downright boaring with a bunch of "me-too" copy cat wannabe making boaring stuff that's expensive and NO good.
Yes, there are some drivers larger than 22", but
the 31.5" 500W Fostex driver used in that sub is a little flea weight compared to the 370 pound MTX Jackhammer that is design to handle 6000 Watts.