k70 or k70 rgb?
also, is this your first board? i'm assuming so.
i say the qf TK is the safest bet. why?
people are used to the numpad even if they KNOW they don't use it ("do i know or do i just think i know"

). having one is backup against buyers remorse without sacrificing too much deskspace and still getting access to mechanical switches.
red vs white? do you mean scientifically? if not, then white is much more relaxing as a general consensus.