I'm thinking about purchasing the Sigma BC1200 wireless model bike computer for my new road bike and I'm getting some contradictory information about interference with my A-series (low end) Polar heart rate monitor. Some say it won't interfere and others have said it will give skewed readings if I use both on the bike. I know a fool proof method is to simply use the wired model, but I just don't like the way they look on a bike, even Jan Ulrich's bike. Feedback? Experiences?