It's true that there can be a wait for Soul wheels. Personally, I went with Soul's because of the hubs, price, weight, and depth of the wheels I was looking for.
I got last year's C5.0's for $1340 after shipping. 50mm carbon wheel weighing in at 1350g. I was looking for a wheelset that I could use for everything; an aero wheel that I could also use for climbing. So the Soul C5.0 was the best option for me. Have had them for a year now and am totally satisfied with them.