TPmodding has informed me that the Fushicai USBTV007 usb video capture device is the best choice. I am on my second STK1160 device using OSMC on a raspberry pi2 and it just is not stable. Note: It is necessary to use external power and a USB hub. I can surely say that you should not use the STK1160 with the pi2 at this point.
If you have a stable ambilight grabber setup, please post which grabber you have and more importantly, a link where you purchased it.
I have just purchased this "Easier Cap" for $10 http://www.aliexpress.com/item…mm-video/32648776826.html
There is a cheaper one that may ship slower for $7 here: http://www.aliexpress.com/item…V-Easier/32649108992.html