| New Road Angel is excellent, and very easy to switch between cars. Complete plug and play.
If I remember rightly, the Origin b2 has loads of wires and is more of a hassle to install.
I've got a Road Angel Classic. I never use the laser detector (waste of time IMO) so I just use the GPS detection. Spot on, cheaper than the two you mention, and you can get a lifetime subscription for £99 (like I have). Bargain. | 
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