Composite Systems for Restorations: Which Are You Using?

Dr. Steve asks:
I have been using the Estelite composite system – both flowables and hybrids. I think they produce a beautiful restoration that blends in well with the natural tooth. But there are so many new composites coming on the market. I want to stay competitive with the dentists in my neck of the woods and I want to stay at the cutting edge of product development. What composite systems are you using and are you satisfied with the results? Have any of you moved on from the Estelite composite system to something you think produces better aesthetics?