If you want to buy an Octane elliptical, and many people do, then why on earth would you buy the Q37 series machines? I don't see their value to the average consumer. Save some money and buy the Q35 or move up and purchase one of the Q47 series if you have to buy an Octane. Or you can do what I would do and purchase either a Precor or Lifefitness unit. With the CE model, you add the contact heart rate and some extra money. You get these features standard with many different brands that are much less expensive.