Even if you do not choose to buy any Televue eyepieces, I have found the advice of Al Nagler to be of value and has improved my understanding of how to pick an eyepiece. I would encourage you to visit
http://www.televue.com/engine/TV3b_page.asp?id=154
The Televue web page and read from the "advice" pages...it will be time well spent.
Clear Dark Skies to you,