I can't suggest one over the other since there is such little feedback. IMHO you need tubular exhaust manifolds with these size turbos. I wish Greg's were available (and I knew about them) when I had mine installed. That gets pricey and makes the TD 05 kit seem resonable all of a sudden.
Been driving my pe1420s for 4k miles now. Had to get a new tranny just recently... You break things much faster when over 500 RWHP.