>We used Brian Zehring's mammoth 30" f/4.3 Starmaster, which also
>happened to be getting its official first light.
Now that's a scope I would love to look through some time.
Hickson 50 is a great catch!
Maybe now onto some of the other "ultimate challenges"?
http://www.angelfire.com/id/jsredshift/ultimate.htm
or
http://www.angelfire.com/id/jsredshift/aintno.htm.
You already have one of the hardest objects on the short list, but the
UKS-1 globular sounds like a worthy follow up. It's the faintest
globular in the Milky Way, heavily redshifted by dust. One of the
only known visual observations required a 36 inch scope and very
steady skies.
(http://www.angelfire.com/id/jsredshift/obscure.htm)
David Kingsley