Hi Jaeger,
I looked for ages when getting a wide eyepiece for the same scope, 8" f6.
I bought and tried a few, and took some back. I kept two, a Japanese made Konig 40mm, and a Televue Panoptic 35mm. The Panoptic is a superb eyepiece but expensive, the Konig was much cheaper and nearly as good, but they rarely come up for sale. Basically I found none of the cheaper (sub $150) eyepieces in this range were worth having.
There's been a couple of threads about the Superview, have a look at these:
http://www.iceinspace.com.au/forum/s...ight=superview
http://www.iceinspace.com.au/forum/s...ight=superview
Cheers,
Jason.