Price range is seriously the biggest factor now. You should post your budget because suggestions will be all over the shop if not.
I am a Garmin Vector user also and very happy with them. They can and are used throughout any weather condition. I swap them between my bikes, it takes 2 minutes tops to swap them around.
Power2Max with Rotor3d+ is what I would seriously consider putting on my racing bike, but that's because it would go on and stay on there.
Money no object I would go down the SRM route.
For the £500ish (second hand) bracket I don't think anything is better than the Vectors and I say this because they give L/R balance stats and are so easy to swap around your bikes.
I personally would not touch anything made by Stages after seeing and hearing all the nonsense.
