I was talking to a ford deisel tech myself about 2 months ago, as my brother has a 04 F250 Harley Davidson Super Duty with Banks power upgrades, and the guy was saying that the new diesels are way to complicated with the new 3 piece oil pans and way more parts then the previous 7.3L's. He said hes replaced plenty of blown turbos at 25-50000kms.
I cant remember exactly but he was saying that they are set up as it is at the max and do not respond well to more boost.
as far as appearence is converned, i wouldnt be. Its made to haul shit and work hard, who cares what it looks like.