Dont know anything about your MA6900, but your JM speakers are definately capable when driven by a bit better of a player.
For about $2500 you can get into a Wadia 850, or for the $3500 you can get into a Wadia 860. You can probably get into the one piece Levinson box for that as well. All of those units use more modern drives should you require service.
For about $2500 you can get into a Wadia 850, or for the $3500 you can get into a Wadia 860. You can probably get into the one piece Levinson box for that as well. All of those units use more modern drives should you require service.