I recently traded my 4" Kimber on a 5" Kimber and I'm much happier. I've been rigging up the Kimber to be my dedicated range gun for IDPA stuff.
My Springfield Parkerized Loaded is a great pistol, too. That's the one I carry, which says a lot about the quality.
I am probably the only kid on my block that has issues with Wilson magazines. I think the springs are too weak on the Wilsons and I wind up replacing my magazine springs. Other than that, they're really nice magazines, and when I replace the springs, I put in the Wolff springs, which gives the mag a real kick in the pants. I can usually tell when a Wilson is giving out when it won't trip the slide stop when empty...
Most of my magazines now are Chip McCormick Power Mags. Those seem to run flawlessly in my guns. That doesn't mean you'd have the same experience, but it's mine. Like I said, I'm the only guy I know to have had problems with Wilson mags, but it just kind of killed my confidence in them. I'm sure I'm possessed or something.
I haven't had any problems with 8 round magazines, and at least for the last several years or so, Colt and Kimber have been shipping their pistols stock with 8 round magazines. Springfield still ships with 7s. I haven't even tried the stock magazines that came with my Springfield since I have so many aftermarket magazines lying around anyway.
Good luck and have a great time at the show!