Itching for better sound


Pretty happy with sound through my Sennheiser HD700s listening through headphone amp to classical CDs on Marantz CD6006...but too much headphone listening makes my ears buzz, so I want to start listening more through speakers.

Could set up either the Marantz or a NAD 516bee cd player, connected with RCA to an old Denon AVR1404 receiver to speakers.  My PSB speakers are fair.  What I want to know is how much will a pair of Kef LS50s improve my sound?  Is my $800cdn (used) better spent on something else--other speakers or another component?
shostakovich
+1 to @soix

Rogue Audio makes nice products at decent price.

I have nice collections of headphones including Stax 009s, Raal Sr1a and HD800s.

But headphone can not beat speakers in dynamic illusion although Sr1a get close to speaker.
+ for the Rogue

i own a pair of Cornwall’s, they would not be my first choice for The Ressurection, but they also would not be the last....

btw I caught a Cleveland Symphony performance where they used a large leather clad sheet of plywood and a sledge for emphasis !!!! 
Have fun, get out to dealers and listen, enjoy the music
Was that plywood/sledge for the famous "hammer blows" in Mahler 6?  I'll be attending Mahler 2020 festival at the Concertgebouw in May--NY, Berlin, Vienna Phil among others.  That should whip even the finest audiophile equipment, and it's why I can't afford any major upgrades just now.

Thanks to everyone for their input.  I will keep my ears out for the right amp!
As for the Rogue, I really need something to which I can connect two sets of speakers.  Is that an audiophile no-no?

Would welcome any thoughts on these three amps: Yamaha A-S801, Marantz 6006, Cambridge Audio CXA-81.
I would go for the Yamaha, it has the most power of the three and the lowest price. The Marantz seems a little under powered. The Cambridge does not have tone controls which may or may not be an issue for you. Of course the sound quality is the most important and I have only heard the Yamaha and it seems to be a pretty nice sounding amp.