I should have provided the reason in the OP. The kind of riding I do are rides with my cycling team. Usually 50-70 miles, speeds anywhere from 20-30 mph (I know, it's a big range). I am also a Cat 4 who does crits, so it's not like carbon is going to give me too much of an edge at that level. I also can't afford to have dedicated racing wheels, as many of my teammates do, so cost is another criterion to a preference for alloy wheels.