I don't think GSW or Denver make much sense at all. They've both got very able long-term solutions at the 3, and any cap flexibility they can grant Pierce isn't going to get them far enough down to do anything special.
Golden State makes a lot of sense. They are a likely tax-paying team who have a big contract for a useless player (Biedrins) and more money tied up in a player they don't need in Richard Jefferson. The problem is that Biedrins has a ETO and Jefferson has a player option, which makes the timing of a trade a bit problematic.
A true blow it up trade would be Pierce and KG (if he agrees to waive his no-trade clause so he can head west with Pierce) for Biedrins, Jefferson, filler, and first-round picks, at least one of which is far enough in the future that it is likely to be available when PP/KG are gone from GS and the Warriors have a chance of sucking.