i have a 2006 sprinter 2500 extended, high roof, and i was thinking of getting into a 07 or 08, has anyone had an 06 and now has an 08, if so i would like to here the pros and cons and if it is worth while upgrading, my main concern with my 06 is winter driving, i tried a couple diff snow tires and it didnt hlp much, all info will be appreciated!!