I'm not sure what the primary use of your truck is - the Duramax in question - but I feel much more comfortable putting money into improvements on an older, solid truck than I do on a new one.
If you like diesels, and I do (the noise, the smell, the... romance, shall we say, of burning glorified kerosene; added to which is the fact that I occasionally pull stock trailers loaded with bison) then consider purchasing an older rig in non-rusty condition, and making it better; making it your own truck.
From talking to lots of dieselheads, I think the most efficient, most economical diesel you can operate in a light truck is the 12-valve Cummins with aftermarket improvements. The 7.3 Fords have lots of fans as well, but it seems to me that you want to keep it as simple as possible, and a six just has less moving parts.
I have a '94 Chevy 1.25 ton 4x4 (3500HD) with an old 6.5 GM, a 4L80 automatic, and 4.88 gears. Is it fast? No. Is is smooth to ride in? No. But it still gets 13+ miles per gallon, and I'll be able to keep it running, comfortably enough for me, for many years on a lot less than $30,000. When this engine wears out, I'll likely drop a 12-Valve Cummins in it, or possibly even a C7 Cat. I could even install air-ride seats if I get tired of bouncing around.
In sum: I'd rather have an older truck I know inside and out, than a new one that requires Monthly Payments(!!), gets poor milage due to modern "advancements," and requires a PhD. to work on...
If you like diesels, and I do (the noise, the smell, the... romance, shall we say, of burning glorified kerosene; added to which is the fact that I occasionally pull stock trailers loaded with bison) then consider purchasing an older rig in non-rusty condition, and making it better; making it your own truck.
From talking to lots of dieselheads, I think the most efficient, most economical diesel you can operate in a light truck is the 12-valve Cummins with aftermarket improvements. The 7.3 Fords have lots of fans as well, but it seems to me that you want to keep it as simple as possible, and a six just has less moving parts.
I have a '94 Chevy 1.25 ton 4x4 (3500HD) with an old 6.5 GM, a 4L80 automatic, and 4.88 gears. Is it fast? No. Is is smooth to ride in? No. But it still gets 13+ miles per gallon, and I'll be able to keep it running, comfortably enough for me, for many years on a lot less than $30,000. When this engine wears out, I'll likely drop a 12-Valve Cummins in it, or possibly even a C7 Cat. I could even install air-ride seats if I get tired of bouncing around.
In sum: I'd rather have an older truck I know inside and out, than a new one that requires Monthly Payments(!!), gets poor milage due to modern "advancements," and requires a PhD. to work on...