Well, illomatic has some idea's. I dont agree with any of them thou.
Road bike wheels in general, the Pre fab ones are more than strong/light enough for 80% of most users. Unlike mountain bike wheels Pre fab are generally considered better than one, that can be built by a shop, Ie Mavic Open Pro's are generally used as a winter wheel set.
I agree - the R550's that come stock on his bike will be more than strong enough; however, I'm just passing along some advice from things I've learned the hard way in terms of wheel choice. Ross said he was looking to upgrade - I'm only giving advice on what to do in terms of wheels if that's where he's looking to spend cash.
Hand built wheels are the more economical choice - plain and simple. For instance, $800 got me a set of CK's laced to OP CD's w/ Revolution 14/17's and Salsa Ti skewers, including build. At just a hair over 1400 grams they're lighter than Ksyrium SL's and upwards of $400 cheaper. You do the math. At 32 spokes per wheel if I do break a spoke 50km's out I can still limp home without destroying my rims.
I'm just trying to prevent Ross, who seems to be someone who buys the best at any cost, from wasting more money on hype. Sorry you didn't get the same advice early enough - you should really try a set of nice handbuilts some time.