Really like the look of that S5R actually
Theres only a couple of those detectors that give all round protection though, cost a fortune
I think you're mistaking the point of them fella.
I'll give you the order of priority for this type of thing in my car.
1. Laser jammed
2. Radar detector
3. GPS camera warning system
Basically. The laser jammer physically stops police with laser guns from getting a speed reading on you. From any distance. You can see gatsos and any other speed camera so you can quite easily get by without a camera detector.
Radar detectors basically tell you when there's an ACTIVE radar signal being used. Aka a speed camera that's working. This is brilliant on the M25 when they have the reduced speed limit (so basically if you're on the m25) because you can then tell which ones you actually need to slow down for, and it's rarely more than 5 tbh (I usually go from the a23 junction 8 to the junction for the. M40).
GPS detectors are truly for the lazy. They offer no purpose other than to warn you of what you should already see if you're driving with your eyes open. You can argue they warn you of mobile sites, but police can setup mobile sites wherever and whenever they want, so unless you don't speed you'll never be protected from them anyway (without a jammer of course).
Long post and I did it on my iPhone so there are probably some silly mistakes.