I currently have:
M3ti, VP100, QS4, EP175, Denon 1802

My room is about 12ft x 20ft with vaulted ceilings, but I'm in an apartment so I can't pump up the volume/bass as much as I'd like =/ Hopefully I'll get a house/townhouse soon so it won't be as much of an issue.

I have two questions:
1) What speakers should I upgrade first? What will give me the most bang for the buck?

2) Any recommendations on a good DVD-A or SACD? I'd like to find a good orchestral disc that has nice strings/percussion/etc, but I'm not very familiar with what is available.

Thanks,
Jeremy