I had a Sigma BC2209 MHR STS+Alt and while you'd think it was a great computer at the price, I've had nothing but trouble with it. When the second brand new unit was not working properly right out of the box, I decided it was time to send it back to Amazon. My first thought was to pay the extra and just get a Garmin Edge 305 with the cadence sensor and HR monitor. However, apparently the Garmin has dismal battery life when used with the cadence sensor - something like barely 5 hours of runtime. That is going to be unacceptable on longer rides like centuries or brevets or randonnees. I'm a data junkie so I'd like something that allows me to download all my trip/ride info into a PC for analysis. I also really want cadence because I find it difficult to stick to my optimal cadence without a computer to show me and the result is I either mash gears or I spin out too much. Any suggestions? I see that VDO makes a unit similar to the Sigma BC 2209, but it's almost as much as a Garmin, which has more functionality even with the lower battery life.

Garmin Edge 500

Don't know about the 305 but my edge 705 gets well over 12 hrs with hr and cadence going. If you don't need mapping, I agree with Elvo. Edge 500.