Pretty sure custom x comes in a 164 as its longest length.
BTW im 6'11 265lbs and i ride a 165w, i used to ride a 169w but wanted something more nimble so i bought a berzerker and i love it, really stable and fast.
receltly seen 168x wide on ebay.
You won't get much problems with extra 3-4cm, but you get alot of fun with it.
May be i'm freeride and carving rat, so i'm voting for longer one
no 195 would be classified as Ginormous lol
I'd go for undertaker 195 anytime if find it =)