My first kitchen, so please assume I am a total numpty about it all! 
Two questions about splashbacks (if that is the right word for the bit that goes on the wall between the countertop and the wall units?). Firstly, I have 2 x 4 metre runs of worktop in my planned kitchen, facing each other. I would like there to be totally smooth, continuous splashbacks not tiles if possible, and I'd like the splashbacks to be unbroken so there are no joins. But is this possible with a 4 metre length? Most places seem to stop at about 3 metres? How have others solved this issue?
Also, it has only just occurred to me that I will need plug sockets.
I don't really want to break the splashbacks to put these in. So I have been wondering about putting them in the side walls instead at either end of the kitchen. But will it drive me mad not having plugs more centrally down the run of units? Or will it just look odd having them at the ends?
I want everything to be very minimal!