What would be a better buy?

I have the opportunity to purchase either the unison research unico or the denon pma2000. the unico is $300 more expensive, but would it justify a much better sound? They are both 80 watts/channel, but I am almost sure that the denon is more powerful. I will be running them with aci 2000 speakers, which is sweet sounding and just a tad bit laid back. Please help. Any advice would be greatly appreciated.

Ian