hey guys, was just wondering what spark plugs you all run? (if you're willing to tell that is

)
my bike's still got the factory plug on it and was told that thats a piece of crap. i'm going to change it but after doing some reading i'm left wondering what to change it to :?
i've been told to use either a (all ngk) bm6a, bpmr4a, b95egv, b8es or a br8eix????? also - which champion plugs are good? or do I steer clear of them?
now I've no idea as to which one to use (the most common one i've heard of is the 6a - and thats what most chainsaws and wippersnippers use) so any advice on what works, perfornace gains (with reference to other mods) and problems would be greatly appreciated.
cheers, andrew