Exotic/hybrid/combinations props?

[Time]

I run a 27pitch 16" 6blade similar to the one below and have been quite happy. similar ot the below.
http://i53.photobucket.com/albums/g52/bigted1000/6bladess.jpg
But it's worn out and needs replacing.
I've come accross the below, has anyone any experience with similar designs?
http://i53.photobucket.com/albums/g52/bigted1000/exoticprop.jpg

[Tim.M]

I've never seen the bottom prop before - 1/2 cleaver. Interesting. Who makes it?