Most significant upgrade

it would help if you listed your equipment generally speakers would be the best upgrade

i think source is the best upgrade.

Not so much a upgrade in my case, but a real thrill, the Daber Monitor 3 speakers, really nice. The Xantech BT6 bluetooth wireless dock. My ipod touch now has become my wireless music server. It sounds amazingly good and does not cost a semester of college tuition. It is way cool.

Not for nothin', but as I see it your first two -- and most important -- components are Margot Timmons and the general ambient music in New Orleans. Ask me: relax and enjoy, you're doing it just right.

Room treatments!