I disagree with 'another s in s' about the 6 speed. I think the LESS power you have the more you need the extra gear - but we've had this discussion before so I won't go more into it.
just wanted to provide an alternate opinion (mine) that 6th gear is pleasant for cruising in flat places (Arizona) at 75mph or more and is nice for that exciting UPSHIFT at an indicated 150MPH. When cruising at 110-130 in mounatinous areas I tend to swap between 5th and 6th gear.
Having moved to NY last year, 6th is only for freeway cruising now