Here's my two cents, and a bit more:
1. After speaking with Wilson on a LONG phone call, I did get them to acknowledge that they use frames made by the same maker as Kimber's frames. (did you notice how that's worded?) They said that Kimber had some problems with their specs, and the Wilson frames are made differently. (same material, different measurements!)
2. I really like my Springfields, but I've never heard of a $711 one...either $500-$600 or $1000 for the TRP. Make sure you're camparing apples to apples.
3. For around a grand, you're also in Rock River's ball park...in other words, do you want to spend $700 or less on a fine working (though not especially pretty) Springfield; spend $1000 on a Rock-River or bottom of the line Wilson, or $1500 on a real custom (Bilby/Heinie) or a custom/production Wilson?
4. Oh, yeah...here's another biggie! The stock Kimber parts are McCormick's "bargain" line of parts (hence breakage and poor tolerances). Some pistolsmiths use MC's stuff, but only the top shelf stuff. For more on this, ask Brian Bilby.