I like heavy chips, but it seems like 16g would be too heavy.
If money's no object, check out these chips:
http://www.kcchips.com/
The photos at that site don't do them justice, so here's a better pic of the $100 "Rounder" chip from eBay (which only sells the sample set of 4):
I got the sample set (to use as card markers), and they are beautiful. Pricey as hell, though.