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^^ what JB and Rogan said.
That said, the metas will resolve far better than that amp could ever manage, so yes they would be overkill IMO. You'd probably be better off with the original LS50s and a little sub. I've found that sand-filled, heavy-duty stands are transformative for stand-mount speakers
My money is on the likelihood that you walk out of the store with another set of floor-standers though
My concern for Soul is that as he has had floorstanders for a while, that he really will notice.
Just gotta demo them if you can @soul - only way to decide IMO. The Meta's were the only speakers I've purchased blind with the intention of keeping them, and I didn't get on with them despite the mad hype reviews.