What is a really good sounding low volume system??

I'm trying to gear up for when I get married this september and move in with my fiance into her place. Living quarters will be cramped and we will share a wall and floor (thier ceiling) with the home owners. Headphones don't sound like fun but perhaps I'll have to bite the bullet and buy some hd 800's or something. I suppose my other option is to build a "second" system that really excels and sounds good at low low volumes. Nearfield listening? I've thought about just adding a nice pair of bookshelf speakers to my current front end, something that lacks bass but excels in micro detail and imaging at low volumes. I guess I could set up a secondary nearfield listening station but don't know where to start. There is a prima luna pl2 integrated amp for sale locally and I'm wondering if this int. paired with a bookshelf speaker that has great detail and imaging might work for me.
What do you guys think??