Factory wheels are machine built. One relatively cheap and easy way to maximize wheel life on OEM wheels is to ask the bike shop to stress relieve the spokes and true your wheels. I'm at about 1000 miles on factory Ritchey Aero Tours that came on my Coda Elite. I had them do that for me (no charge by the way) at my one month tune up. So far the wheels are staying true. I'm 6'1" and 250, so no fly weight either. My first bike was a Trek Navigator and I broke one spoke on it, drive side rear. Those are the most common ones to break. Oh and yes, heavy guys do put more stress and strain on wheels, high spoke count hand built wheels are the long term answer if the problem continues. As to not costing an arm and a leg, just what do you think one arm and one leg are worth? You can usually find decent buys on hand built wheels on E-bay for around $300 a set. Or you can spend more than your bike cost for one wheel, depending on what you want.
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