So I've been using Cinema1, R0701L, and Shutterdown lately.
My favorite is definitely Cinema1. It doesn't render yellow's very well, but all other colors appear to be very close to what my native eye sees. RO701L is also very good, but seems to give a red cast to many objects. Shutterdown is just too flat for me and if I'm planning to do some color grading in post, I'll just use technicolor or marvels.
Shutterdown has now been replaced with John Hope's Cinema PP, which I've yet to test, but will be doing so over the next few days.
I've used John Hope's Cinema PP for a lot of my work. It can handle grading but works straight out of the camera as well.