..and that leads to which stave? what thickness? what wood? who made it, and what was the bearing edge? ...and so on. Same argument, different application. I like certain metal shells better than any wood shells, so there you go. Again, measurably louder as well. But I digress.Careful, you are beginning to contradict yourself. There is no objectivity here. It's up to the individual.
I think a thick ply shell sounds better than a stave shell. I've owned both.
To steer this converasation to your comment... if I was going to put that kind of cash into a high end kit, it would be a Sonor or DW. Custom shops that use Keller shells do not hold value at all. People that make Keller kits in private (like myself) can expect almost nothing in returned *regardless* of what was put into the kit due to lack of "name brand" status.
In the world of motorcycles, a real Harley may cost the same or less than a Honda Shadow, but won't bottom out on you in 5 years for value. The same could be said of drumwerx.
As stated, I couldn't see the investment, unless you are willing to take a huge loss. $6K into a drumwerx might get you $1,200 for the kit in 2 years. $6K into a Sonor and (assuming you can find one used) could probably get you $4K in 2 years.