They are a great set of wheels and should hold your weight fine (they held my weight at 280), but the $300 price tag is asking too much. You can find 'take-off' pairs of eBay for half of that and have hardly any miles on them. Although you'd probably feel much more comfortable on the second set you linked. These are also another great choice:

http://www.ebay.com/itm/Shimano-105-...item3a6e4a6c68