I have 3 scopes currently + binoculars, and they all have different uses. In my case it is a matter of focal length, with the smaller refractors being better for wide field use, and the SCT being targeted at dimmer/smaller stuff. I don't have a dob, but often wish that I did.
Generally speaking unless you have your own observatory, the easiest scope to set up will see the most use. My current rig takes about 45 minutes to set up and align for imaging use, and about 15 minutes to take down, which prevents me from setting it up on iffy nights, and in fact I have not had it out since December as a result. My first SCT, an LX-90, took about 3 minutes to get to the point of starting an alignment. I had it out every mostly clear night.
You may want to start a secondary thread, "Should I own more than one mount, why do you all have so many?"
