The valentine has directional indicators that provide a better head's up of where the radar signal is coming from, and IMHO provides better sensitivity and signal selectivity. You also have some really neat mounting options if you have an E46 or E39, since you can tap into the power from the sunroof. See the attached:
http://www.ideaphile.com/bmw/mods/v1/index.html
Either way, don't scrimp on this purchase - go with the top of the line or don't go at all. Mine has saved my but several times.
Rich
E39 M5
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