I think at the end of the day, the convienence of taking off your turbo, sending it away for a week, getting it back, installing it the same way it came off. And bang you got an extra 100hp with some tunning is definately an advantage.
Although a 2530 would be nice,
Whats involved in installing a 2530? Obviously water/oil lines, but these only need to be extended yes? And the 2530 just bolts straight on?