Dali Epicon 6 vs Rubicon 8

Epicons are a superior design being a tier above the Rubicons, but the Rubicon 8 may have a bit more bass extension than the Epicon 6. You should check out their new Rubikore series which incorporate many advances in their driver designs.

The new Rubikore is a better speaker then the epicon 8 yet retails for half the price, so I have to 2nd bill_k.

Epicon 6 all day long.  Bing a line up , the Epicons have better guts (drivers, crossovers) and a better cabinet.  Making good inert cabinets is very important to getting good sound and also expensive to construct.  The cabinets in higher end speakers are a much bigger cost component than most folks understand.  Keep in mind that just because the Rubicon has more bass drivers doesn't mean it will have more bass extension.  the Rubicon may pressurize the listening room more fully but that's a different thing all together.