I have beat this question to death in my mind over the last 10 months. I needed to buy a tahoe and I really wanted to wait for the 09’s since a 6-speed tranny was very, very important to me ( I tow a lot and have toasted a few of the 4L60E’s), and a few other bells and whistles would be very nice as well (Nav traffic, SBS, Blue tooth, and especially cooled seats!). I crunched numbers over and over and over, and after you consider the price increases for 09’s, and all the rebates you would not get on 09’s, and the fact that not many 09’s will be produced and they wont have a large selection to pick from sitting on the lots (so I would probably have to order it) the price difference was between 10,000 and 15,000!! That is a lot of money! Especially on something is not going to be worth anything in the used market the day after I buy it.
For 15 grand I can put 5 transmissions in my tahoe IF they break (and IF I have it past 100K mi), and I can change my underwear A LOT IF my but gets sweaty from hot seats.