Recommend a UK radar/laser detector for a Z4

Hi all,

After 17 years of driving and only one speeding ticket, I've now
received two tickets in the four weeks I've had my new Z4 for doing
nine miles over the speed limit in both cases. Obviously, the Z4
doesn't have a huge amount of space in it, but I'd like to know if
anyone can recommend a device that warn me of radar/laser traps. I need
it to be as discreet as possible as I'd hate to have an ugly looking
thing stuck on dash. The two I've found are the Snooper S6-R Neo (ugly)
and the 'New' Road Angel (nicer looking) but I truly have no clue about
these things. Ideally I'd want it tucked away in the storage
compartment where the CD player is but I don't know if that's possible.

Does anyone have any recommendations? Also, can I fit this type of
thing myself or should Ieither get BMW to fit it, or get a specialist
to fit?

Thanks.