OK, so I was waiting for my bike fit appointment and was looking at wheels. The LBS had a set of dealer demo - Mavic Ksyrium Equipe S wheels in white for $325. This is much lower than I've seen them online. After talking with the owner of the LBS and the bike fitter, they both said the Mavic wheels would be a huge upgrade over my current set. My bike is a 2011 Specialized Roubaix SL2 which originally came with a set of slow and heavy Mavic CXP wheels. I took the wheels off my Nashbar Famous Maker which seemed to be much lighter and rolled very smoothly. The wheels are Alex A-Class ALX630s. I can't find much info about these wheels in particular online, besides they are light. http://www.cycleway.cn/aclass-alx630-road-wheelset

I've got about 2000 miles on them running both Conti Gatorskin 28s and Specialized Roubaix 25s with little issue after replacing the rim tape. They are still true and seem to roll well.

Here is why I am asking. I am a clyde. I've been as high as 275# and am around 230# now. My goal is 210 and to stay there. I am not a strong rider (I can do short bursts of 800W, and can maintain 300W for about 5 minutes at a time). I tend to favor distance rides like centuries and such. Our roads in Wisconsin are rough. I am concerned with the low spoke count 20F/24R.

My commuter has a custom set of bombproof wheels which I love, but they are heavy. So are the Mavics going to be an upgrade even though they weigh considerably more? Am I too heavy for both wheels?

I've attached pictures of my bikes. You can see the wheels are low spoke count and low profile. The wheels on my gold commuter are 36H H Plus Son 42mm deep monsters.