everyone above seems to be pretty biased based on what they own. i did alot of research before i bought my 9500ix, so heres what i remember.
edit: check this out:
Escort RedLine versus Valentine One: Comparison Test and Review.
based on the above tests, the redline trumps the v1 in almost every aspect. the only tests where it fell behind were rear detection and photo radar.
in my experience over the last 2yrs or so...ive never ran into a photo radar, so it wasnt a concern for me, nor have i any use for rear radar antenna. im more worried about whats in front of me.
so if its between the v1 and redline id say go with what makes most sense to you (cost? arrows?) as they're mostly on par with each other. if its between the 9500ix and anything else, ask yourself...do you need the gps features? are there redlight cameras in your area? are there a ton of false alerts? also, laser isnt an issue...once you're hit you're basically done with. deflection hits may be somewhat helpful, but the chances are so low it doesnt matter. just get a laser interceptor and be done with it!
i chose the 9500ix based on the gps features..ive detected Ka band radar from behind me a handful of times and dont need arrows to tell me..simple common sense would tell you that if you're getting a legit radar hit that seems to stay with you, its behind you somewhere - either speed up
or slow down and let it pass you. i also live in a fairly urban city with tons of radar emitting grocery stores, so the gps lockouts are a godsend for false alerts! with all this said, ive probably been saved by 10-20 tickets over the last few years (i used to have a 120 mile round trip daily commute to work)