I have to agree with you about the duramax, I have had my 03 for 3 years now, it is a 2500HD 4x4 reg cab with allison trans. I have logged about 49k miles to date, and 43k of them have been with edge performance chip installed, prior to the duramax, I owned a 99 F350 4x4 reg. cab dually with a v10 , auto, and 4:30 gears, loved that truck, but it only got 10 miles per gallon with a tailwind. The duramax on the other hand averages about 18m.p.g. in the city and 21-24mpg on the highway, towing a 71 big block chevell that weighs 3800 lbs on a 18 foot open car hauler through the mountains on the PA. turnpike (I 76) the duramax averaged 19.7 mpg round trip with the chip set on +60hp, cruise speed was 65-70. Here is my opinion, if I can still afford it by the time I get ready to buy another one my next truck will be a 3/4 or 1 ton diesel 4x4. As of right now, I have a slight preference for G.M. strictly because of the allison trans, however I feel that the big 3 as a whole all make a very good fullsize pickup and anymore, all install a good diesel. If I cannot afford the diesel next time, I will buy a 1/2 ton, put some air lift bags on the back suspension and add sway control to my hitch and the half ton would work O.K. for me. Personaly for me though, I prefer 3/4 tons they ride decent anymore and I like not being able to tell the trailer is back there