I bought a Redline and it has saved me twice from laser and countless times from Ka. I still can't tell where Pop is coming from though. If they put arrows on the Redline I would definitely upgrade to that, but until then the Redline is amazing. best $500 I've spent. Since I got it I haven't gotten a speeding ticket and my last one was $4xx about 3-4 years ago. So it has more than paid for itself.
Now, to protect yourself against laser you will need a shifter and a vinyl system/anti-reflective coating. I won't recommend any on that front because I know nothing of shifters. (Never been caught by a laser.)