Quad ESL 63's-Can they play rock music?

A business accquaintance I deal with approached me today completely by surprise and mentioned he had a pair of Quad 63 ESL's that he wanted to sell me for $200!
I took a walk to the back of his office and sure enough there they were.
He mentioned to me that the speakers needed repaired at a cost of $600 from what Quad told him and he already purchased another set of speakers.
It would be my responsibilty to box, ship and deal directly with Quad.
A few things...
I guess first of all, is this a good deal?
Secondly, I do listen to a lot of different music, but I certainly enjoy my rock music and I'm concerned about the lack of a bottom end that these speakers are rumored(?) to have as one of their traits.
This is the speaker that got me involved in this crazy hobby as a teenager and I've always had a desire to own a pair...but are they the right speaker for me?
Your thoughts please.
Cary 303/Rogue 66 Magnum/Odyssey Stratos

Thank You!