Any question answered...

Also, the DA7800 brakes on my bike at the moment suck, that's with decent pads on.

Got a chance of a cheap pair of 6700 Ultegra brakes which have the updated bits and bobs to increase the stopping power. Has anyone used both and can give me a comparison

My DA7800 are awesome. Stock pads, variety of rims. Also use the Ultegra on winter bike but with Shimano large callipers. Nowhere near as good but to be expected from cheap ass calipers with crashed shifyers