I would also have to agree, this isn't a Harley I would like to see in the films... I don't think it would be considered anyway. To me it doesn't really say "Harley Quinn" in any sort of way. Sure you have the painted on diamonds, you have black and red... but like, anyone can wear an outfit of red and black... alright, well you get what I mean anyway.
I don't like all of the accessories, and i'm not fond of the makeup or the hair. I still think the converse are an interesting idea, but I too am more into boots. When thinking about her outfit, I also think about what she could actually function in though. Having worn many different types of boots, they look great but you can't kick ass in them too well. haha.
So my definitive choice for footwear would be some sort of high laced army boots, or something similar, big black steel toed doc martins -perhaps with red laces, perhaps one black and one red... or something of the sort. I'm still developing my costume to include all of the new ideas I come up with and potentially some of the good points made here