I have a lack of depth in "soundstage".

Components are designed for certain functions, including speakers - thats why matching your needs to the components is so important. Things that effect choice of speakers: size of room, loudness required, amount of bass needed, amount of transparency required for imaging, tonal balance perferred, and the list goes on and on..............Thats why its a hobby, it isn't simply plug and play. There are speakers that do it all well - and they cost very, very, big bucks. The challenge is to find a compromise that works for you.