Warrantee on those?
Disclaimer: I do custom wheel building, so that's makes me a "competitor" of sorts...although I kinda doubt Campagnolo is too worried about me...
One thing to consider is that they are fairly heavy at ~1580g/pair, especially when you consider how few spokes they have and their original price point. As you may know, replacement parts for the Campy wheels are extremely expensive. If you do a google search for "Nucleon Rim", you'll see prices of $130 and up even at the "discount" mail-order stores! That means one big pothole can leave a really big hole in your wallet.
If these are used wheels, are you getting the factory warrantee? I believe these were discontinued after 2001 in favor of the slightly tweaked Neutron version. I'd be sure Campagnolo is going to warrantee you if you show up with a problem in 2005.
At your weight, you should be able to use a much lighter <u>and</u> less expensive wheelset and still have good reliability expectations. For example: We do a Campy compatible build using the semi-aero Velocity AeroHead/AeroHead OC (asym) rim. It's ~1450g, and costs $300 including shipping to the USA. Cost for a "no questions asked" crash-replacement rebuild on one of these wheels is only ~$50, and that includes a new rim, all new spokes, new nips, labor (free repairs for two years), <i>and</i> the return shipping! It would also be brand-new and includes a full factory warranty on all the parts...you can see the specs and compare them for yourself... <a href="http://oddsandendos.safeshopper.com/2/99.htm?79">Front</a> and <a href="http://oddsandendos.safeshopper.com/2/100.htm?79">Rear</a>
I think Campy makes some of the nicest factory wheels available, and the hubs are generally very nice, but it's hard for me to get excited about paying $400 for relatively heavy used wheels that are super-expensive to repair and may have an iffy warrantee status. But then again my opinion is admittedly a little biased ;-) .