I am trying to do the same. I found what looked like great deals online and at local shops. I asked a similar question to yours today b/c the deals seemed too good to be true. Folks seemed to think they were fine. Not as good as the nice stuff. But ok. Try thebikebiz.com; bicyclewheels.com; and wheelandsprocket.com. Lots of folk gave the advice that if you do buy online, take them to your local shop to have them trued/retensioned, then get them retightened after a couple of months.