For flippers, I use real rubber. It just plays better. Others look better and have lots of colors, but I have removed them all and gone back to real rubber.

For actual playfield rings Titan rubber rings look really nice, last long and play well. Try to make sure you size them correctly because they don't like being over stretched. I really like using the Titan white rubber on EMs where colored rubbers would not look correct. The Titan whites I think are overlooked because everyone wants to use colors. The white is pure white. I mean it is WHITE and cleans well and doesn't seem to yellow over time like white rubber does. I get tired of buying white rubber and it comes slightly yellowed already.

For posts that take a huge amount of abuse, the Superband 3/8 and 7/16 bands are awesome.