Is this enough power?

Experiment with both the 4 and 8 ohm taps as you cannot hurt your amp or speakers.

Try both taps and use the one that pleases you most! In my set up I found the sound changes a bit been the 4 ohm tap the one I like most because the bass notes are more tigh and the music sound more "relaxed."

Good job getting the impedance data. sounds fine.
However, your job is not done yet! See if you can find some phase data. This IMO is the true test of 'good load/bad load'. Huge phase angles at low impedance will really drain all but the most robust amp. Speakers which are heavily capacitive do not like tubes....or perhaps the other way 'round.

Trying the various taps on the amp? Best idea yet.

Magfan - is there anywhere i can go to find out more about phase angles. that is something i am not familiar with. Does it have something to do with the slope of the impedance curve at a specific frequency?

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.