Marantz PM-15S1 vs Roksan Kandy II?

I'm thinking of buying the Marantz PM-15S1 Integrated Amplifier to replace my Roksan Kandy 2. I know it's a step down in power but I rarely have the Roksan higher than 10 o'clock...I can't imagine that I'd suffer with only 80 watts vs 150. But I'm not sure because I like to have headroom. Any thoughts or experiences?