Thanks for the replies, gentlemen.
Wavy, I think there's just a couple of EPs I'm still to try,
David, the Superviews are Erfle designs, which is the most common EP design in binos. Certainly worth a try as I too have the 30mm Superview. I do know some bino EPs have small field stops put into them to control abberations, so the view with the 30mm should be interesting. I tend to forget my old workhorse these days. I'm glad I still have it. I'll report what I see with it in the next few days.
Matt, I too am not too keen on my 28mm Meade SWA in the 4" achro. BUT the 34mm is pretty good I have to say. I'm just getting greedy with wanting even more than the 4.5deg TFOV it gives me. Not that I can get too much more, but a 5deg TFOV sounds mighty goooood!
Haven't tried a 31mm Nagler yet. I'll see what I can do. See Wavy, one I haven't tried yet...