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!
greh
I second TWL's comments. I love the Quads and, over time, have owned 2 different sets of USA monitors, but I spent a lot of money replacing panels on both sets. The first set came from Florida, so I thought the panels were more prone to arcing due to their use in a humid environment. The second pair was new and still had panel problems. I used a VT100 and VT100MKII and, on occasion, would try to play at moderate levels in a small listening room. Although I did not consider that I played them loud, my dealer and the importer judged that the panels were likely damaged by playing them too loud. So, as much I like these speakers, they were very frustrating and expensive to use and maintain. I ended up selling them.
Of course the Quads will play rock, but the fact is they are not optimized for loud playback (> 85dB). They will give solid and very tuneful bass response down to slightly below 50Hz. The extreme high end is a little rolled off, but the mid-range is still state of the art. I am not familiar with your power amp, so I can't say if you could just drop the Quads successfully into your system, but I would still strongly advise your to get the Quads, if only as an experiment. Used Quads in decent condition can be sold for $1,400 and up.
I've owned two different pairs of QUAD 63's and a pair of QUAD 57's and I loved all three sets , and played a lot of rock on all of them. After all, even AC/DC has a midrange.
Actually very little rock has bass below 50Hz and the QUAD's are surprisingly good in the midbass region. QUAD's really are everything everyone says about them. You'll never regret owning a pair, even if you don't keep them. By the way, don't toe them in and do drag them out well into the room. Peter Walker's rule of thirds really works (1/3 of room length, 1/3 of room width). But, eventually, domestic unacceptability of correct placement will make you sell them. Until then you'll have a great listening experience.
I second ALL of the above. As you described them, these Quads are indeed a bargain.
You'll find solutions for whatever is needed -- and, as Seth notes, even AC/DC have midrange.
I have owned 63s, have had them modified by crosby and had occaisionally replaced panels. That being said, I have kept them for almost 20 years. Although they have some limitations, I have never heard anything that matches them. I both listen to rock music and play electric guitar. Although the quads won't play shatteringly loud they are certainly reasonably loud. If you need louder get a powered sub and use a high pass cross over. The quads will play louder and you will get added bass. Nothing I have ever heard produces sound across the range as naturally as the Quad. It sounds like a steal to me.