If your LBS has a wheel builder with a decent reputation, they might be able to look at the wheels for you and give you better info than we can. Otherwise, just ride them until they give you trouble. Keep an eye out for broken spokes, and also for cracks in the rim where it meets the spokes. When either of those crops up, you'll need to deal with it. Until then, just enjoy the ride. The wheel trouble you'll probably eventually run into, won't be a catastrophic failure while you're going full speed down a hill.