Mike, the noise is noticeable, but I haven't decided if it's a deal-breaker or not yet. Actually, while I was experimenting this week, I also picked up a set of the Gibson Sam Bush strings to try rather than my usual J74s, and the pick noise was way less on the Gibsons strings that the D'Addarios, especially with the pointier style of V-pick, so I guess string material influences how your pick attack sounds as well (Monel steel vs Phosphor bronze, in this case, the bronze bringing out the "chirp" more).
I'll probably try the Wegen triangle soon, it's still a pretty approachable price range (holding out on Blue Chips till I get a more expensive mandolin ;) )