help pick my steampunk costume for AnachroCon!

Please help me.
I'm going to my very first steampunk con this Saturday, which means I'll be wearing a costume for the first time. And... here's where the clockwork deer gets caught in the headlights.
I don't know what to wear.
I have 3.5 outfits photographed. I can mix and match the pieces and am not 100% sold on any one look. I also know that a big part of steampunk is accessorizing, and I don't have a lot of those yet. Hence, the con. There's even a hat-making class!
So, if you will, please let me know what you think would look the best for AnachroCon, an alternative history con in Atlanta. Mixing, matching, head shaking, and suggestions are all welcome.
1.Brown and black.

2.Kinda steampunk pirate. Needs accessories.

3.Steampunk libarian, shirt open.

4.Same, shirt closed.

*
Available pieces:purple/gold pirate corset, brown steampunk corsetwhite renfaire blouse, black renfaire blousewhite collar blouse, brown and white engineer blousebig circle skirts in plum, tan, blackstagecoach skirt in shiny green
*
Halp!
*