I'll second the Yello. I have Yello's "One Second", and Yello's "Essential Yello". These are very well recorded and are pure pleasure to listen to. They will really put your system through it's paces and if your system can do it well you'll find they are difficult to take off the play list.
Patricia Barber's "Modern Cool" has some really outstanding accoustic bass lines on it. I really like this disc as well.