"They are not as dynamic as many other speakers and will not convey a live performance as well to me".
Fair enough as you added "to me". While I disagree, especially when you add "The Vandersteen's will not play loud without compressing", we are all entitled to our likes/dislikes. I know that I've played my 3A Sig's very loud with nothing but a big smile on my face! I heard nothing "compressed" at all.
"All the Maggie, Quad, Martin Logan, ESL, Soundlab and VMPS owners will agree" - and I'd bet "all" 5A owners, and a lot of 3A Sig (with subs added to keep cost comparable) would not agree, and not cause they don't like these others/planers - its cause they love their Vandersteens!