We also need to know whether you play cash (if so, what stakes?) or tournament, and how many players you expect.
But basically, these are my picks:
~25¢/chip: Monaco Casino, Crown Casino, or Monte Carlo (slugged plastics)
~50-60¢/chip: Apache china clays (Majestics, Pharaohs, Royals) or Tina ceramics/hybrids
~$1/chip: BR Pro ceramics, or possibly some used casino sets