Good speakers for Parasound Halo JC1

Sorry, should have mentioned that. I’d planned to spend $12-15k ($17k if I’ve had a couple of beers with my buddies the night before!) 

ideally I’d be able to get a matching center channel from the same manufacturer. That’s in addition to the above budget. 
thanks. 

@mikempls , I am very familiar with the JC1. It is arguably one of the finest amps on the planet. If you factor in the price, it is the finest amp on the planet. It will drive ANYTHING. It is one of the best amps to drive Magneplanars and Sound Labs ESLs. Of these speakers the Magnepan 3.7i is the best value. The 20.7 is a better speaker but twice the money. If you are a heavy metal person they are not the right speaker for you. ESLs are a whole other bag of worms but the Sound Labs 645s are the sweet spot in terms of value. If you are a classical person they can not be beat. If you are a rocker you will need a subwoofer system.  For dynamic speakers IMHO Magico makes the best but a value they are not. For bookshelf speakers on stands you can not beat Harbeths. For value Golden Ear Tritons. For beautiful woodwork Sonus Faber. If you are a heavy metal person Klipsch Cornwalls will rip your head off.  

Thanks, Mijostyn, this is very helpful. I know Maggies well; I live in Minneapolis-St Paul where they’re made. I’ve been intrigued with them since I was 18 — just  concerned my room isn’t a good match. Perhaps I should reconsider.  I’m not familiar I with Sounds Labs ESLs so I’ll check those out.

I forgot to mention that I already have 2 REL S510 subwoofers so I should have that covered. 

Have listened to Magico speakers at the audio shows — very nice and very expensive. 

Anyone familiar with AudioVector?

They did well with my Andra Eggleston Speakers.