Based on what I know about my SCT, this is what I want in a scope...
I love crystal clear images. My favourite objects are star fields, open and globular clusters, and the planets. Of course I like deep-sky too, but a rich open cluster always amazes me. I also always seem to gravitate back to my MK-70 40mm, because of the wide-field (relatively speaking, for an SCT) view with tons of pin-point stars... I also have a 22mm Nagler and 12mm Radian but don't use them as much as my MK-70. I don't like the dimmer, hazier views given by my higher powered pieces, although perhaps in an Apo this wouldn't be an issue.
So, I'm thinking I'd prefer quality to aperature... however, I think a scope like a 15" Obsession could give pretty clear images and everything would be much, much brighter. ANother selling point for an Apo would be the portability... just taking a scope and going helps me get out more often. I love the thought of getting a 4-5" Apo, but $5000 for an OTA? Wow... is it worth it? I should also mention that I do want to experiment with astrophotography, but right now it's not a big concern.
I know a lot of you are going to say "visit star parties", but I'm not in an area that has star parties... I'd have to drive a ways to get to one. So in the end will anyone really be able to help me out? Everyone has their own favourite scope, I'm sure... I guess this just come down to personal preference? Probably... but any advice would help! Thanks!