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
In regards to whether the amp will make a big difference - I assure you - you will be amazed.  It will be as if you bought new speakers as well.  That's how I felt.  Cheers!
Leemaze -
Just curious, what speakers are you driving with your Yamaha A-S801. I was thinking of getting one to simplify my office system. I did a listen a while back and was pretty impressed with the amp. 
Hi ljgerens,

It is rock solid.

Wharfedale Diamond 10.7s and Wharfedale Diamond 220s