Buy some mavic rims. 729, 721 or 823. I have the syncros dps36 rims and they aren't as good as mavic (not even close). The front wheel I now have is a dps36 that I have had for about 1½ years. The rear rim was just changed for a new one (both the new and the one before are dps36's). My front rim only has a few flatspots (thats a few more than what I would have had with mavic), but my old rear wheel rim was so full of flatspots and buckles that I had to change it. Well, I tought that it was just bad luck, so I went and bought a new dps36 (the one I'm running now). A month of riding and allready a few flatspots. I'm never ever going to buy any other rims than mavic ever again.
Atleast here in Finland, mavic rims are a bit cheaper than syncros. Heavier, less durable and more expensive? I don't get it.
Gotta change back to 721's or maybe 823's for next summer.