I've sold several OEM wheelsets on craigslist just to get them out of my garage, and they usually sell for very little, like $50 with brand new tires/tubes, which is a huge win for the buyer.
An OEM wheelset might be ideal for you, they're usually a little porky, but that's because they need to hold up to the heavier and more abusive riders.
Also, I noticed you are running 23mm tires.. If you pop a 25mm tire on there and drop the pressure 10-15psi, it'll ride like a totally different bike. 28mm is even better if it'll fit, but that's unlikely on a 15 year old bike.
Edit to say: 225lbs isn't that heavy, most wheelsets (outside of superlight racing wheelsets) should handle your weight.