The concern isn't how often a wheel goes out of true. The issue is that if you break a spoke, you're walking home, while you could lose 2 or 3 on a 32 spoke wheel and still finish your ride. Since you already have the hub and use the same wheel for racing, I would just go with the Deep V and hope to continue the 10,000 streak. If you can afford it, pick up an inexpensive set of wheels (i.e. Ultegra/Open Pro) for training and race on your 16/20. I use my 32 spoke wheels on my commute, on most training rides, and in the wheel pit at races.