I really like the chips at Canterbury Park in Minnesota. They use Bud Jones composite with insert. Nothing fancy, but it's what I used for the first 2 years of playing cards(this is probably why I like them).
I recently bought a bunch of $1 chips off of ebay. The Aria has a pretty classy design, I like how the Wynn has a big plastic disc that covers the entire middle of their chip and Caesar's Palace has a cool design on the outer area of the front of the chip.