kimbaz It seems the power adapter from hardkernel is 2A but I have been using a 3A for margin (and of course a 3A supply delivers a more stable 2A and with less consumption)
I have tried more or less all the official skins from the Kodi repository and none slow anything down, even some with loads of images on screen (these are a tiny bit slower because of the loading of those images, there eMMC might help (I trust wrxtasy ) a bit but personally for the price difference I won't switch to eMMC just for that)
Also I did not overclock my C2, I find it more than powerful enough not to stress it more than planned for, even though I have a fan on it (due to the Rpi 3 box I salvage for it)
I recently acquired a second C2 (since I'm so happy with it), it sits in a RPi plexy box (no fan) and satisfies me just the same as the 1st one
For me it's a huge step up fron RPi 2 and 3, even on a 1080p display
And the RPi 3 fails to render the 4K properly even downscaled to 1080p
I have had RPi 1 (second version, with more RAM and all) for some time, the moved on to RPi 2 and 3
I was always happy but disappointed to have to optimize everything for a more or less smooth experience
When I acquired my 4K display I had to upgrade my device and I followed the legendary page from wrxtasy : Pick the Right Kodi Box
I did not care for looks, remotes or other than display (4k), sound (max possible), efficiency and the original Kodi experience (no fork)
So for me that's (almost) the only choice
And I'm like wrxtasy I do not use attached disks, only a NAS