Is there anything wrong with the current wheelset? Alex DA-22 aren't the best rim but they make a really good wheelset. I'm currently rolling a set of them that I built 2 years back and they're going strong.

Unless you're relatively heavy and jumps curb all the time, I don't see why you need to upgrade to something more heavy. However, my opinion could be total BS to you.

What type of rim are you looking for? Spoke count?