>>1317767how about you post some photos of what you're talking about on this image board, lad.
it's quite common to run big boy panniers up front and the lower centre of gravity the better, unless you're concerned about ground clearance because you're going offroad.
how large panniers should be and how safe your setup is, is really something you can tell by riding it better than we can by speculating based on nothing. there's so many variables.