The Kate Effect, Part ???

I'm in the market for some nude pumps, so obvi the Duchess of Perfection was the first source I consulted.  During a People magazine reading one of our marathon text convos {we are sister wives, after all}, she just raved about her LK Bennett Sledge pumps.  Says she wears them allllllllll the time.

 And while I do think they would be a terrific investment, her clothing budget is just a smidge more generous than mine, so I am forced to look elsewhere for more wallet-friendly options. I'm such a plebe.

Here are the contenders.  I need your opinions and feedback, s'il vous plait. 

 1 // 2 // 3 // 4

Which ones do we think?  I'm back and forth between the first two pairs, but I think they're all worthy of consideration.