If you admire present-day chamber music, Navona has something you might think seriously of getting. American composer Samuel Adler (b 1928) has been prolific in this vein. A nearly three-and-a-half-hour set Works for String Quartet and Other Small Ensembles has recently come out on the label and it goes for $9.99 as a decent MP3 download at iTunes.
Of course it's not because it is inexpensive that I mention it. Samuel Adler's chamber music is quite well crafted and inspired. Fourteen works are represented on this retrospective set: string quartets, violin sonatas, piano trios, all very decently played by various artists in decent sound.
Adler's chamber output varies in style between neo-classicism and mainstream modern. In all cases it shows a lively and fertile, inventive musical mind at work. There's a booklet that comes with the download.
How can you lose? Good music, good performances, great bargain to boot. To find out more, go to http://www.navonarecords.com/artists-a.php click on "Adler, Samuel" and you'll see the album at the bottom to click on.