There is a caveat to this advice, IMHO. Some states get real picky about trucks with GVWRs over 10k lbs. You start to get to be considered commercial by the local constabulary....and if you don't have DOT safety kits, log book, etc, and don't go through scales they can get testy. I know the F350 1-tons are 10k lbs, for the most part, but the F250 3/4 tons are slightly under (usually). Mine is 9200lbs GVRW. That prevents a lot of potential issues here as I go past weigh stations constantly. I know a guy here who has been hassled by the cops with his F350 towing a tractor by these weigh stations.
This has been a big topic in the Ford Trucks forums, especially for people in the NE states.
Chris, I agree with your point in general, but sometimes there will be other issues that come into play.
I'd love to have the V10, too, but given how I use it, I get by just fine with the V8. I just have some patience on big hills, and get my foot deep into the loud pedal. I bought it used, and used V10s are very rare.
-Dave