I have the M6500 with the 580 i5 cpu and FX2800 M6500 as well.
I was able to get 10.9.1 installed, and for the most part working. USB 3.0 is good, and ethernet, bluetooth are good.
What wireless adapter do you have working? (Dell 13xx series)
Do you have the tap working on the touch pad?
Which Audio VoodoHDA kext file did you use, and does the scroll/slider work for volume?
Thank you!