I think the "best" directly relates to how much you want to spend. Do you need low dollar, or $$$$.
The rotors here are amazing, and priced as such.
http://www.solomotoparts.com/Brake-Tech-Axis-310mm-Iron-Full-Floating-Front-Brake-Rotors-for-ZX14-Ninja-06-12/?gclid=CJvGqZGD0bwCFepFMgodJWEAQgEBC, as mentioned, are probably better than we get in stock form. On this particular caliper, I'm not convinced we have a "rotor issue" WHAT??? Huh?
I took my calipers down at 8000 miles. They were filthy inside. TONS of brake dust. The sliding pins were gummed up. Thats not too many miles, compared to what most here do. I think the dirty caliper causes the pads to not fully retract. That little bit of extra drag creates big heat, causing the pad deposits or warping. Plus, I think our stock 08 pads are aggressive and may run hotter than the later pads.
It is the internet, so I reserve the right to be full of ****.