I like Rondo, Bradley, Pierce, Sully, KG the best.
I'd prefer to have Bradley coming off the bench because I think his best value actually comes with his ability to change the pace/tempo of the game and really put the other team on their heals with his on ball defending. But I'm not a fan of Pierce at the 2 and Lee can be frustratingly inconsistent so there aren't many other options.
People seem to be in favor of the lineup with Pierce at the 2, which I agree puts our best 5 on the floor at the same time and can create some mismatches with Pierce and Green playing, but I just don't see it. I think PP is too slow to keep up with most teams' speedy SGs and will give up some easy buckets on defense or get into foul trouble and I worry about him running himself into the ground chasing them around. The offensive advantages might outweigh the defensive issues, but I'm skeptical.