If you like funky, loungy, lo-fi stuff scope the Hotel Costes series. Look for their 10th anniversary 10 disc set (Le Coffret Anniversarie), and also St. Germain's De-Pres Cafe - Paris 10 disc box set is excellent too. That's over 10 hours of music in each boxed set.
The Brazilectro series is fantastic too. I think they got up to 10 discs, and I would start with the earlier ones in the series as I think they are a bit stronger.