Surprised at how turntable sounds

Hi,

I'm new here and I hope this, my first post, is in the right spot.

I'm hoping for some feedback and help about what happened with a turntable I've just got.  My system has two Dynakit Mk 3 60w monoblocks, a Sonos Port, two B&W 702 S3 speakers, a nas with my music saved as flac files, and a new Denon DP-25F turntable.  

I've only recently set this up.  I've had the monoblocks for quite a while and have been impressed with how they sound.  The B&W speakers are pretty new, and are probably the stars of the system.  To me they're amazing.  The nas is nothing new; I've been using it for years as my music source.

Other than the new turntable, I've been blown away with how great everything sounds.  Even my wife is impressed.

I've just set the Denon up.  I've been wanting to get a turntable again for years, obviously not for the convenience, but because of what I've heard about analogue audio.  I was really surprised when I heard it.  What I expected was lush, full sound.  I thought it might even sound better than music with nas files as the source.  I hoped it would.

It didn't sound better.  It was - what I can best think of to describe it - "thin" sounding.  Switching from the LP to the nas and back was quite a difference.  The nas music sounded great - rich, full, and deep smooth bass.  The music from the turntable was better with "loudness" turned on in the Sonos app, but still sounded mostly acceptable for a party.  Something I wouldn't listen to all that closely.

The cartridge is a DSN-82 stylus.  Should that be adequate, or better than adequate, for my system?  Would I do well to get a new cartridge?

Should I get a new turntable?  

Anything else?

Thanks much in advance for reading, and any suggestions that will help me understand what's going on.