SOLER,
In all fairness, my '01. 5 was a good truck. It had a few issues; steering box replaced under warranty, clockspring 3 times, lift pump failure, etc. It was a bone stock ETC auto, so its not really fair to compare to my new ETH six speed. To be completely honest, I would have kept it if it was a six speed dually and I'm sure I'd still be quite happy with it. Despite that, my '03 steers way better (now my wife can drive with the camper on), the brakes are better (even though the '01. 5 had the rear disks) and I like the interior better as you've said. Much nicer for the kids.
I do wish the 3rd gens still had HX35's and Dana axles, though. I would agree that the 3rd gens are much closer to their potential and there isn't as much room to bomb before requiring more significant changes (turbo, for one) as the older trucks. This hasn't bothered me too much, yet because at 305/555 it seems to have enough power for my needs and I don't plan on modifying it yet.
Cheers
Dave