You are right, it is hell trying to figure on what to buy.
If you do most riding in town, I'd go to the Escort 9500ix as it has a GPS in it and learns to filter out stuff like door openers and the like. They update it's database weekly on Monday so yo can also get things like speed cameras and red light cameras added into it which may help you.
On the open road, their Redline unit is pretty awesome and I've gotten boogies as far as 4 miles out. I doubt the Adaptiv has two antennas like the Redline to sniff out signals better. The Redline is not a GPS backed unit, but made for long-range detection with it's dual-antenna setup.
Both have earphone jacks unlike the Valentine One which requires another box. From that earphone jack you could feed a HARD system or Marc Parnes LED unit. I feed the earphone into a Autocom on all my bikes and that takes care of the warnings to me as it overrides the music and I hear "Ka Band" which is CHP in CA.
You can always toss a shower-cap cover over either unit if rain comes. Chances are you will slow down anyway so just toss the unit into your bags or wherever it is dry. Aerostitch has some covers for them too.
The irony of this is that I just got my Auto Club of So. CA Westways
magazine and the CEO is telling how they oppose some if the additional fees being added onto a $100 fine making it closer to $500 now (i.e. court costs and buildings, CHP fees and retirement, county fees, etc.). So a good detector may cost you big dollars, but if it saves you just once....
(I know mine have - and I got 4 of 'em including "Da plane!"