A friend of mine is looking at upgrading either 2008 Mega Cab Cummins 6.7 and a 2007 Mega Cab Cummins 5.9 mainly because of lower miles and price was reasonable on either. Question is pros and cons to going with either? Both has auto tranny and laramie package and 2500. He is also looking at a 2012 MC laramie 2500 auto too but is quite a bit more money.......so in this case, 2012 MC vs 2008 MC both being 6.7 auto and laramie....pros and cons?