Something like a Spendor A5 or A6 would be a natural match with that Quad pair.  There are a lot of Spendor owners who also have Quads.  Dali Mentor would be worth a look too.

A couple of others to look out for; Proac (a British company) sell quite a lot of speakers without advertising very much and might be worth considering because several of theirs would gel with Quad - they largely seem to sell on word of mouth. 

Owned by the same parent company as Quad, Wharfedale has just released the Jade series.  I've heard them and they're extremely nice sounding.

On the subject of record players (I'm an ex LP12 owner), I was interested to see that they now out-sell CD players two to one.

http://www.whathifi.com/news/munich-show-iag-to-showcase-a-slew-of-new-products

Part way down the page and you'll see the internals.

Quad is quite popular but owners don't often post on forums.  In history, Quad were not great supporters of audiophile box swapping.  At the end of this post, I've linked to a  quotation by Ross Walker which contains this section;

"Do you try to appeal to the audiophile market?

"No. The audiophile is on an endless quest He wants change. He is not interested in something that is good enough to remain unchanged."

But if Quad is the best, shouldn't he end up with Quad?

"But he wouldn't be an audiophile; that would be the end of it. How dull it would be.""

http://www.onethingaudio.net/FOR/QUA/GEN/9512-QUA-GEN-HIS-RW.htm

The full interview is well worth the read.  The walkers have gone now but the 909 is a pretty close descendent of the amp that was in place when Ross Walker left.

I hadn't seen those before.  Those are the equivalents of the old 99 monos which have conventional topologies and aren't current dumping.  The 909 is quite a different design.

The monos that I've seen are much bigger, analogous to the Audiolab 8200M although I don't know what's inside.  Also, a current dumping 909 variant.