I'd be happy with your six orestis.
3, 4 and 6 I can find easily.
47 tuc might be a bit of a challenge from my backyard (trees).
ngc 2516 I may be able to locate.
The Fornax cluster will probably prove extremely hard for me.
But that's what the word CHALLENGE means, doesn't it?
I like Michaels idea of a mix of targets according to scope size/experience.
Sab I think your suggestions are a little beyond my present capabilities
.