@hilde45
I had a good chat with Jim Salk, who said that at a recent RMAF show he played his Salk 9.5 towers (8 ohm, 87 db) with no problem from a 30 wpc tube in a 30x30 room. I'm likely going to change my order (I'm going to think about it a bit) to the Salk SS 6M speakers.
http://www.salksound.com/model.php?model=SS%206M
hilde45,
That's smart to touch base with Jim before deciding on amps, those who design and build speakers typically know what matches up well.
The 6Ms appear to be using the nice Satori Berrylium tweeters and Satori Papyrus woofers, a bit lively between 100-1000hz, could sound very musical for you. I was using similar mid-woofer drivers in a few builds a few years back, to achieve a nice balanced and neutral tone. Of course it's in the crossover too but they are decent drivers he's using there. A friend has played with Satori drivers in some affordable speaker builds he felt turned out to be pretty good too. They hit right in the hi-fi value pocket too.
>>With a really good preamp/amp or really great integrated amplifier<< I'm sure you'd be pleased with the 6Ms. While I know Jim says a 30w tube amps will work in a 30x30 room, it truly depends on the level of tube amplifier too. See what amp he recommends at 30w first... :) David, If it were me, I would not under-buy on equivalent amplification for these speakers in order to yield their true potential. These could also turn out to be good long-term speakers for you too.