This site has some good info -
http://www.televue.com/engine/TV3b_p...Tab=#Eyepieces
and another - although it refers to 8" SCT the f10 of your scope matches, and the basic principles are there.
http://www.televue.com/engine/TV3b_p...n=Advice&id=97
Although the above two are TeleVue, the principles are the same no matter the brand. The important parameters are focal length, FOV, eye relief, and true field of view, all of which can be googled. There is a great calculator, again at televue, where you can enter your scope's details and see how different eyepiece designs behave in your scope. You can apply these results to other brands if you want to, just match focal length and FOV. For instance, I think the GSO superviews are 68 degrees, similar to Panoptic:
http://www.televue.com/engine/TV3b_p...212&plain=TRUE
There is some good info here on eyepieces too, as well as a bunch of other stuff:
http://www.iceinspace.com.au/glossary.html
And finally this one is great. You can enter your exact scope details and eyepiece brand/model, and then get an idea of what the view will be. I used this to choose my 35mm Panoptic, based on what would give me the best possible view of Omega Centauri with my scope. (you can do a search for different objects under the 'targets' tab. Choose 'eyepiece' under the mode tab):
http://www.skyatnightmagazine.com/as...iew-calculator
Cheers
Stephen