Frankly that sounds like a relatively light rider in pretty gentle conditions. Are they insanely hard on wheels? Really almost anything decent should be reliable under those conditions. That said, if they're not chasing marginal replacement gains, the best reliability would be from some wheels built very conventionally--32 spokes, normal J bend spokes (preferably butted), decent rims, nice, unexotic hubs. Quality of build has a pretty major impact. Aforementioned A23 build sounds great.