the Ctek 7002 and over the years I've had a couple Optimas (yellow/red) and the X2 deep cycle battery.
Can I connect a charger on each battery in a dual battery setup?
Does your dual battery system have an isolator? You could run two chargers if they aren't connected electrically. If they are wired together you have to treat them as a single bank. So if you have two 100 A-hr batteries wired in parallel then you need a charger sized appropriately for 200 A-hr.
The Nocos the guys have are fine AFAIK, people seem happy with them. Battery Tender and Schauer are also respected brands. As another data point recommendation I have a BatteryMinder 128CEC1 that is pretty similar to that CTEK you had, with the desulfation pulsing. It is also temperature compensated, which is nice to have since it'll adjust so it's never over or under charging as the weather varies. It's also pretty similar in price and I've been happy with it since it has a Odyssey-specific profile.
The monster, heavy duty charger I run is an Iota DLS-45 (being 45 amps) with two plug-in controllers, the standard IQ4 profile for flooded and regular AGM and the IQ4-AGM profile for my Odysseys (I spent a lot for them and they're more fickle about holding a high voltage for absorption, so I'm kind of OCD).