All that is, is a modded stock turbo. Which you could do to yours without buying a whole new turbo. My buddys 2000 7.3 has a ported housing, that he then polished the inside himself. And it made a great difference. He runs Stage 2's and custom tuning and his modded stocker works great with that combo. And he did not pay no $1400 bucks either.
Depending on what you want to do with your truck, mod wise, in the future; if I were you I would rebiuld your stocker, then go from there. Again thats just what I would do, its your money.