photographic wish list conundrum...

I'm debating what to put on my wishlist--I'm looking for something for wide field imaging, both ccd and film. I'm torn between a Borg 76 f/6.5 ED or a high quality ED telephoto lens in the 200-300mm range at about f/2.8 or f/4 or so. Both would work fine with my film and ccd cameras. The borg I could use visually (although I haven't a need for a quick peek scope), but a fast telephoto would be a great addition to my wildlife photography. I already have a borg 50, so I would just need to buy an objective and reducer, knocking the price down to something comparable to a decent used lens. what would you all suggest? Also, any suggestions on ED lenses I could adapt to my pentax cams?