My understanding is that it is difficult to achieve "aggressive" focal reduction on a DOB due to available focus range, which makes your argument about 1/3" chips being capable of the same FOVs as 1/2" or larger chips simply by using more focal reduction potentially moot. My experience with an Xtreme is apparently different than yours as I have had good success with exposures under 30sec. Certainly your sky conditions play a big role, so if you are under heavy light pollution and need to use filters, your total exposure time will tend to drift up into the 60sec range. That being said, there is no reason why one can't stack short frames from an analog camera and stretch the result's histogram to get the sensitivity you want...exactly the same as if using a USB camera.
Your statement that there are fewer software choices to use with analog cameras is misleading. Off the top of my head, you can use an analog Mallincam with: Astrolive, Miloslick & Sharpcap...all of which provide stacking and histogram control. I also use VirtualDub with my analog cameras to give access to some nifty filters like WarpSharp or UnsharpMask. With a ZWO camera your choices are Astrolive or Sharpcap, with the Infinity camera you can use only the Atik software, and with the SX cameras you can use the StarlightLive software. Seems like in fact there are more software choices using the analog camera. There is also Astrotoaster out there but you can use that with any camera that allows you to save screen captures. Thus in my opinion your argument about analog MC cameras having poor software support is incorrect. Perhaps you are mistakenly lumping in MC USB cameras with this discussion?
I am in agreement that the Lodestar X2 is a very capable camera. If the OP is interested in a laptop driven camera system then I would recommend they consider it as one of the options.
Personal preference is indeed a huge part of what type of camera people like to use. I find myself sitting on the fence. I can appreciate the subtle details that stacking many frames at short exposures can reveal, and the advantage of working with a single cable, however with this comes a commitment to a way of doing things. Most of the time, with the way I observe, this commitment is fine. In the field or doing outreach this commitment is harder to accept. To this day I still believe that my Xtreme ICX418 delivers the most vibrant colour and sharpest detail of any camera I have used, and all in a single exposure. No dicking around with darks or tweaking colour channels or trouble finding enough stars to get a good stack. Sharpness of image, or rather the lack there-of, is in my opinion a huge weakness of all USB cameras. I am at a loss to explain why none of these USB camera software packages have a sharpening tool, something that analog cameras have had since the beginning.