I am a big fan of Beltronics Vector 965; my current radar detector.
I do agree that the Valentine One is the top choice, though, I didn't have to spent $400 either. I've always wanted one, though never justified the expense...
I've had Beltronics radars for the past 8 years now and I've never gotten a ticket with one...oops, correction, I've gotten one; I was clocked (paced) by an aircraft!!! I think they have awesome warning distance and never fail to warn you. I've gotten warnings from almost 8 miles away (going over an overpass, got a warning about a Ka band that was roughly 8 miles away).
When a radar company offers different models, always stick to the more expensive models...
Good luck and let us know which you end up with...