suggest tube amp wattage for my speakers..?

Take a look at Welborn Labs recommendations for speaker and tube amp matching at: http://www.welbornelabs.com/recomendspeaks.htm There you will see "minimum recommendations for speaker sensitivity are as follows:"

3 watts or less - 94dB minimum sensitivity
8 watts - 90dB minimum sensitivity
15 watts - 88dB minimum sensitivity
25 watts - 86dB minimum sensitivity

"These are general guidelines and can vary by plus or minus 2dB depending upon the impedance of the speaker, the type of music listened to, the size of the listening room and how loud you like to listen to your music." They walk you through some examples.

The speakers that they recommend are "either very high efficiency or medium efficiency with relatively benign impedances." You might want to look into this with regard to your speakers.

Anyway, I think Welborn Labs is a great place to start. Good luck.

That's WELBORNE LABS. If I'm going to quote someone, I should at least spell their name correctly. Cheers.

• IMHO, impedance curve is probably most overlooked stat. for speaker use with tube amp. Check what frequency minimum impedance is at. Tube amps not good for impedances which have wild swings.
• 87dB sensitivity isn't very great. Recommend sticking with a larger push-pull amp.
• Don't make mistake of running minimum wattage. Allow yourself headroom. You might be able to get by with minimum if you listen mainly to jazz. However, if you like to rock out occaisionally or listen to classical…
• Often overlooked is crossover slope. Recommend a 1st or 2nd order xover for use with tube amp.
• Check reviews online to see what amps reviewers are using with speakers.
• E-mail manufacturer for recommendations.

How much power do you have now, as in 8-Ohm rating AND 4-Ohm rating? Do you feel you have enough power? Or are you clipping at your loudest levels now?
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Beavis, I think your comment regarding the impedance curve of a speaker is truly overlooked.

I'd been told that my ProAc Response 2.5s despite their 86dB sensitivity rating would be SET friendly because of its mild impedance curve. To be honest, I have no idea what the impedance curve of my speaker looks like, but this weekend I found that my new 37wpc Bel Canto SET40 has more than enough beans to drive my ProAcs to very high listening levels. I was quite surprised to find that it had nearly the dynamics and bass weight of my BAT VK200.