Only THE premiere radar detector...
I haven't used one myself, but a guy I know has one of these in his SS, and he swears by it. I have been using a
Cobra ESD 9550cs for a little over a year, and am pretty happy with it. Remember, a radar detector will never make you 'police proof'. From my experience (have driven, consistently fast, with a radar detector for 5+ years) if a cop has you spotted out and uses one of the 'detector-proof' technologies (laser, pulse, etc...), which make it extremely difficult to react and slow down before he has already gauged your speed, then you are screwed. The vast majority of the time cops will have their radar on and just pointing at a section of highway (or wherever) and a good radar detector will give you ample warning.
I have recieved a couple of tickets over the past few years, but have 'avoided' too many to count. I feel naked and blind when I am driving without a detector. I am pretty sure my friend with the valentine one has seen similair results over the past few years, but then again his car lets him drive ALOT faster than mine (read: beefy v8, versus japanese v6).
While I have considered buying a Valentine one, I decided against it because it didn't have a text display. IMO, a text display is TEH feature for discriminating between real 'hits' and fake grocery-store crap... Then again, my cobra display is virtually unreadable with any amount of sunlight.
That is about all..
Oh, btw, whatever you do, don't get fooled into going for the 'voice alert' models, the crappy vocal cautions are nothing but an annoyance after approx. 3 minutes.
Hope that helps!
EDIT: Whoops, on dialup and all the responses, past the first one, didn't load. Oh well.