Weinnmans' are heavy...over 700gms I have heard. I have a wheelset with Weinnmans and although I have never weighed the rims separately, the wheels are very heavy (well over 2000 gms), surprising given the the hubs on this wheelset are very light, the spoke count is low (24/28), and the spokes are butted. My only explanation is that the Weinnmans are indeed extremely heavy.

Deep Vs aren't exactly featherweight, but much lighter than Weinnmans.

Are you considering the possibility of a custum build..because if you are there are much much better choices out there. If so, you might look into Kinlin rims..I've had nothing but good experiences with those. I'm not sure if they are available unmachined, but its worth a try. If unmachined Kinlins are unavailable, you might consider a Deep V in the rear, and a machined Kinlin XR300 up front...that will shave a lot of grams of the front wheel, and the wheels will still look identical. The nicest FG wheelset I have ever built is a pair of Kinlin XR300s, with Sapim CX Ray spokes (24/28), formula track rear hub, and a featherweight formula front road hub. Total cost was around $300 and the weight was a bit over 1500 gms, including the tracknuts and front skewer. You could, of course, shave a lot of money off that price by using a cheaper rounded butted spoke such as a wheelsmith XE15 without any additional weight.