Yes we still sell and offer testing of Turbo props.
We have propped 100's of Checkmates. I've owned a few as well.
There are many options depending on your mail goals. Standard 4 blade props are not my first choice. Quad 4 props like mentioned above will work to decrease porpoise but will scrub a bunch of speed. Modified 4 blade props can be the best overall performers. However, we have found the Bravo 1 to respond to the adjustments the best.
3 blade props can have the best top speed on these boats but are lack luster in the low end.
All of these props will work but the best choice is dependent on your desires.

Brett