You may not be looking to lash out and buy Televue, but there's lots of good info to read at
http://www.televue.com/engine/page.asp?cat=2
I've been very happy with the views through my 8mm Hyperion in 8" Newt, but are using a 13mm type 6 Nagler more and more.
Once you do figure out what you want through research and looking through other people's gear, I'd suggest its worth waiting for what you want on IIS classifieds too. You can generally sell well looked after 2nd hand gear for what you bought it for.