Certainly a list that I wish I could afford
If you are planning on just using it for visual purposes then any stock focuser on one of these instruments (Feathtouch or not) will be more than enough. Having a very rigid focuser is more of an issue with the heavy loads of astrophotography when you NEED to minimise all forms of flexure.
For visual use I would usually say "The biggest that you feel you are going to be happy to lug" because lets face it, optically any telescope on your list will be a dream to look through. The FSQ 130 will potentially have a better field with wide eye pieces due to being internally flattened (no discernible field curvature).
I do remember your original thread but cannot remember a lot of it so I guess size also comes down to the cool down times. Are you wanting to setup and be ready to view quickly or would you plan on pulling all nighters? Larger refractors take longer to cool so you may get better views out of a smaller one than a bigger if you only plan on observing for short periods of time.
If you want to do imaging further down the road I would probably go with the FSQ 130 over the others because it is more plug and play; no need to get extra flatteners and then deal with spacing issues and the like.