Pure is irrelevant if you're making frizzles. They aren't accepted in the standard and would always be AOV.
As much leaf litter and mud as they collect already, I think designing a d'Uccle with foot feathers that sweep forward seems kind of cruel. But that's my opinion.
Nate, I like #1 but she has a couple of mostly white featehrs that concern me. Make sure there are no all-white feathers as it's a DQ for mf. She has a good even mahogany base though. I'll bet she's gorgeous on her next molt.
#2 doesn't have clean spangling and isn't holding herself in a show position, but she has more white and judges seem to be into more white these days. Definitely show as many as you can and see what judges in your area are looking for.
The cockerel is not a bad-looking boy! How are his feet? Can't really tell in the pics. But I love his posture.
The cockerel in with the pullets has an awful lot of white on him. Watch that, due to the white feather dq issue. The little girls are cuties!
Are you NPIP? How far are you from St Simon's Island in GA? I have family out that way that we may be seeing summer 2012....