Am in the market for a new bike computer for my roadbike with cadence function and I like the idea of having my heart rate displayed on it as well. My current HRM unit is quite big on my wrist and annoys me after an hour or so on the bike and often hurts my wrist after lon MTB rides. It looks like a choice between these two models but am struggling to find reviews on the CS400 in particular as its quite new. The CS400 has an altimeter built in which may be useful on my offroad rides.

The CS400 is also twice the price of the CS200 and I'd have to buy a separate cadence unit (as well as two speed kits for my MTBs regardless of model). I think what I'm asking is: how good are they and is the CS400 worth twice the CS200 ?

I've also ordered a RS200sd today with footpod for running - my poor bank account!