The brakes can wear down the brake track on the rim, until it's too thin to hold the pressure.

You can use any wheel for the front. The rear wheel needs to fit Campagnolo cassettes. You can use the 10 speed versions, since the splines are the same as your 2005 wheel.

I had hairline cracks in my back Vento wheel, after 16,000 miles. One of the spokes pulled out halfway, enough to put a wobble in the rim. Then I noticed other spoke holes had cracks, too.

I got an inexpensive Mavic Aksium Race rear wheel with a Campagnolo freehub.