need advice on speakers

I am interested in purchasing bookshelf sized speakers for my bonus room. This room is modest sized and I listen to music at low levels. I prefer warmth over bright, must have presence without being muddy. I listen to jazz, bluegrass, and acoustic (think Jerry Garcia and David Grisman). I have a Peachtree Decco amp and a Rotel CD player (both bought here on Audiogon)
Budget is under $750, would feel less guilt if around $500 

What do you recommend I consider? Is there anything listed on this site now that would fit the bill?

Thank you in advance for your help

Andy