Hi, I'm new to spinning (4 months) and absolutely love it! I bought the shoes and completed a 3 hr charity spin with no problem. I'm thinking of getting a heart rate monitor. I don't plan on doing any outside races but are there reason's this would be a good purchase? Is used OK? or should I go for new? I'm slowly losing weight by spinning and wonder if the HR monitor would help at all. Sorry if I have too many questions for this post? I love reading other people's posts. I find it very inspiring. Thanks!