Mark, on the question about more amplifier power, your phrase "may end up" is right. You shouldn't assume at this time that what you now have won't be sufficient for your needs. If after experimenting you find that more is needed, 100 watts wouldn't likely make a significant enough difference. The difference in maximum loudness between 100 and 55 watts is only about 2.6dB(e.g., 102.6dB compared with 100dB on brief peaks). 220 watts would be 6dB louder and at least that much should be considered.

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Enjoy the music, not the equipment.