To be honest, I have the GE CMS model w a TS 75 module w CS 50 fence and the side extension table. The dust collection is OK, as with the Y connector one hose attaches to the blade guard and one attaches to the back of the TS. I found the quality of the cut is OK. Not as good as my TS 55 when using it on a rail. I get teeth marks on the cuts which have to be cleaned up unless I plan on doing glue ups.
I am using a panther blade in the saw. Which the teeth marks is common as it is a agressive ripping blade.
Adjusting the CS 50 fence along with the extension table (for me) was a pain. It took a while but I finally got it sorted.
I like the idea of having modules being able to just dropping a module into the CMS making my cuts, pulling the module out and dropping another module in it and continung with the project.
With that being said, make a mistake and out comes one module and replace it with another etc.
That gets a little old unless you dont make mistakes.
So what I did was go buy a VL stand ( no modules just the stand only (we can get those here I dont think you can get a stand alone CMS with out the router module in the states).
So after adding up the cost for all these items, yes the modules are convenient but you might be better well served $$$$ wise to buy a nice contractor saw like a Bosch or Dewalt that are small enough to store out of the way and will save you a lot of $$$$.
Especially because you indicated that you were going to get a stationary saw.
Though I always had a stationary saw I dont anymore as I wanted to go to the festool system and living over here I have the ability to buy all the modules and the NAINA items.
I also have a nice stationary Jet jointer which is in storage that Ill get when I get home. I can use the jointer to clean up the teeth marks or even use my 850 with the bench stand If I needed/wanted to.
I would consider and think about the actual cost involved, add up the cost of a TS 75 or if you are going to use you TS 55 then I would become more of a hassle fitting the saw to the module everytime you have to use it and if you have to go a make a few additional cuts installing into the module and taking it out of the module.
If you consider the cost of the saw (if you want a TS 75 mounted full time in the module) the module, CS 50 fence, extension table plus the ability of being able to store the modules out of the way vs the quality of cuts a Bosch/Dewalt contractors (bench type) saw might do ya.
This is my opinion of course, anyone here can get the modules (Amazon a UK/German tool store) if they wanted one. But once you add up the cost.. you might want to reconsider.