more power for Spendor S8e?

I'm wondering if my spendors would benefit from a more powerful amp..right now I'm using an older version of the Mistral LFE integrated amp. Has anyone used a powerful amp with these speakers and what benefits should I expect? I listen to ALL types of music.
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I drove a pair of Spendor 1/2e's with my BAT VK75. I've read that the Spendors respond differently to tube than transister amplification. With the BAT, they were quite lovely. Easily driven, and very rich midrange, especially. In fact, cranking them up with orchestral music was a particular pleasure...the sound just got bigger--no harshness or glare, and still very good definition. (In fact, I need to go hook that combo up again...)
your amp and speakers are fine.