Wow, what great responses...thank you to all who have posted!
Tim, please don't judge me when I list out my music types; it is probibly the most messed up combination of genres and artists that this forum has ever seen:)
First I will get the music question out of the way...
I listen to a wide variety of music but mainly modern rock with a blues influence (the black keys, white stripes, any of jack white's other bands, etc), typical modern rock (foo fighters, Dave matthews, green day, etc), heavy rock (system of a down, seether, etc), jam band type music (dispatch, slightly stoopid), and rap (yes, rap) (eminem, jayz, lil wayne).
The room is a funny size since it is our living room in a somewhat open floor plan but I would figure 14x20 but that is not an "enclosed" room.
Power right now is coming just from the integra 40.1 receiver which is around 100watts per but that can change. I am not opposed to adding / upgrading components down the line as I learn more about my audio tastes and how to satisfy them.
I like to listen loud but when others are in the house it is realistically at a medium level. If you are in the couch you can have a conversation but you will be raising your voice and will end up turning it down to talk.
Hope those answers help, if you need more info let me know.
Thanks again.