All of us are eagerly awaiting SlyPlayer, but until then, have you tried MyMovies movie management software. It's free and does just about everything that you are wanting in your list above.
For some of us, you can pry our mythtv [remote] out of our cold, dead fingers. Very nice integrated, distributed media capture and presentation. Except for BD/HD-DVDs. At the moment I have to boot into a windows partition that has the God awful PDVD (8 I think, with some HD-DVD black magic tack on) to reasonably watch most HD content. A standalone slyplayer that could play the isos will be _so_ welcome.