Panasonic LX-3, (same hardware as the lieca digilux 4); canon G9 or G10; sigma dp1. Ricoh GRd or GX200
All these seem to be excellent quality glass in the lenses, though the Ricoh does have issues with noise at Higher ISO (above about 200). I have an LX-1 early model of the LX-3 and it's really very good. The DP-1 uses an AP-C sized sensor , and the higher ISO noise is probably the best available in a compact camera.
More than 3 I know, and If i had to put my own cash down on one It would likely be the LX-3, or the GRd or DP1.