Top few usually mentioned (in no particular order):
- Travis Wuertz TW90
- Dozier Grinder
Each has strengths and weaknesses. I don't have experience of any but the KMG - which I love and would have a hard time trading for anything else.
That said, there are lots of folk who like the TW-90 and the Dozier.
I'm sure the thread will get lots of hits and maybe (if you're very lucky) turn into another holy war thread...