B&W 803 Nautilus -HELP

Category: Speakers

I have a home theater set-up..

B&W 803N Front
B&W HTM2 Center
B&W 805N Back
Tag Mclaren AV32REX- Preamp-Surround Processor
Mark Levinson 334 for Front speaker
Bryston THX 5 channel amp for others
Tag Mclaren F3 CD20R Cd player.
Silver Sonic Q10 speaker cables

Problem..

Home theater is awesome but

Music - STEREO not so good.

Or should I sell the B&W and get JM LAB instead??

What can I do to rectify the situation