I have three sets: Duramith Tournament, Brunswick Centennial and Aramith Super Pro. I love the Duramith and as has been said, they almost never need cleaning. But in my opinion they aren't quite as shiny when polished as either of the other two.
I have not used the Super Pros yet. I got that Aramith kit that comes with those balls with the measle ball, the cue sticks, cue rack, the Rempe cue ball, leather pea bottle with wooden peas, bridge for a song on Craigslist and sold the cues to almost cover the cost of the whole kit. They look real nice with a little plainer pattern and larger numbers and they shine like crazy new.
The Centennials have a classic look with a little more detail in the bold circle around the numbers than the other two. I had a set that came with my table but mostly used the duramith that I bought for my old table. Sold the Centennials but I realized I loved that classic look and found another slightly used set and bought them again.
They look great when polished, but they seem to get spots on them that almost look like water spots after not much use. Can anyone explain that phenomenon?