I have the Diago 1 and it's very good. Expensive, but good. I bought it before I knew about the Johnny Shredfreak 1.
I needed another 1 sometime later and bought 1 of the Johnny Shredfreak 1s that TF linked to, it's also very good.
He appears to have stopped selling them though as they're no longer on his website, whereas I guess they'd still be on the site if he was just out of stock?