Is this enough power?

That does help and the amp will work. I still caution you that more watts would help your system reach it's full potential.

This will be true on all classical recordings that happen to have low output levels. Your room is large with the kitchen figured in and 30 watts won't let you realize the full weight, scale and impact of your music.

My experience has shown that 30 watts may not be enough if you listen to piano or classical as the amp will most likely clip. I consider moderate levels to be up to 85 - 87db or so. Problem is you need headroom my friend and I really think your going to have problems.

Not all recordings have the same output level as you know and I have found a system like yours will run out of gas with 30 watts (at times). The amp will strain and be pushed with little or no headroom remaining. Perhaps you could "get away" with it and have it sound good most of the time. However, throw in a 100 watt tube amp and you will immediately sense what I am trying to say here.