The Pano may look similar in terms of specs but it's a different beast to the LVW or the XW (which are more similar to each other, though I have not used the 42mm LVW). IIRC the panos have more pincushion distortion and a slightly warmer colour tone. That's not a bad thing, just different. (Pincushion is much preferable to barrel distortion btw, for reasons ...
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With a long f-ratio scope you have a lot more options than us dobbers. But the Nagler 31mm T5 is still the undisputed champ around that focal length. I prefer the 30mm XW though, but it's no longer available. Maybe ES 30mm ultra-wide??? (never tried one but a lot of folk seem to like it)
You could also just get a 30mm Superview (because it's cheap and will do all right in your scope) just to see if that focal length really suits your observing habits. Sometimes you think you should "fill a gap" only to find it does not need filling IME.