My 3150's sound awesome with my 4 Odyssey Lorelei's. In all the different systems that I've heard Butler tube hybrid amps in, it's easy to recommend them.
Evan1 currently has a Butler 2250 with his Songtowers and he seems pretty happy with it but it's 250 watts per channel @ 8 ohms overpowers my Lorelei's. It's all about amp/speaker matching and for someone looking for 150 watts into 5 loudspeakers, this sale is the real deal.
Cheers,
Robin