Component with most effect on soundstage/imaging?

Just curious... I hear lots about how this cable throws such a wide soundstage, or how that front end images so well, etc etc etc. In my experience, I have found that the amp or speakers have had the biggest impact on soundstage and imaging (speakers probably edging out in terms of greatest impact). I have found VERY little difference in cabling. Cables have had an impact on tonal characteristics (e.g. tighter bass, cleaner treble, etc.), but I really haven't heard much of a noticeable difference in soundstage or imagine. Then again, maybe my ears aren't up to it. Anyone had different experiences? Any thoughts?

The reason I am asking... I listen primarily to classical (chamber) and jazz (small ensembles and vocals), to genres where I think soundstaging and imaging are especially important. I am downgrading my system, however, and I would like to maintain these two aspects at as high a level as possible, and I am wondering which component I should focus on.

Thanks in advance, and happy listening!