Their Classic models are a wood composite blend. The Madem series & 2GS are all dynamic trees (carbon fiber & kevlar). The Madem specifically is lighter, has a U shaped pommel (supposed to be for a womens pelvis but I sold a LOT to men back in my day LOL), and has a different foam that supposed to be more comfy in the seat that the gel foam in the 2Gs.
Saddle #4 is a “Pro Panel” and probably won’t work. Its going to depend on how much clearance the wither needs. Again, hard to tell with physically being there with my hands on and seeing/feeling how the saddles fit.
Your current saddle is just a standard, so I can see why you need a riser and I’m going to guess it doesn’t have enough wither clearance either.
If you’re absolutely wanting a CWD, the 905 panel might be the best option to try out of the list. Not saying it will work or that there is a magic combo for your guy that will be perfect, but if that is what you really want, you can always take it on trial. I’m not sure what CWDs policy is anymore but they used to be 30 days or something like that.
However, @hj.eq.xc is correct that a CWD might not be your best option here. I’d explore other saddles, have other fitters out. I’m a big proponent of trying every brand that you can. I’m a princess in a pea when it comes to saddles, and I think there is nothing wrong with sitting in everything that you have available to you in your area. Independent fitters often carry great brands that are less common and are a great option to have out along with whatever other brands/reps you want to try.
One last that to mention is that EVERYTHING changes in motion. Just because you sit a saddle on the horses back and it doesn’t sit totally balanced at first, doesn’t mean it wont balance out once girthed down and you begin working. This isn’t true for every horse, so maybe it’s not true for yours either, but there were a lot of cases that I had horses fitting totally different once they were working. More isn’t always best.