I agree with Newbee and Improb that you don't seem to know yet just what you want to improve. You are juggling with too many unanswered questions. The danger, if you start changing components now, is that for your money you will get different but not appreciably better sound.
(I say the best way to find out what you want to improve is to listen to other systems and make brief notes--this is important--on what stirs you musically in each.)
That said, though, you basically seem to be hesitating between a source and an amplifier upgrade, and you have IMHO correctly identified these as the weaker links in your audio chain.
I remember my experience auditioning Linn Keilidhs biamped and single-amped. To me, one LK140 in a passive setup sounded better than two LK85s in active configuration. I conclude that one great amp will sound better than two ordinary ones.
It's a hard decision to make. You will either have to give up biamplification or spend for two amps, but I would change the amplification first. Get the very best you can, then look to your source. But don't upgrade until you can afford what you really want.
(I say the best way to find out what you want to improve is to listen to other systems and make brief notes--this is important--on what stirs you musically in each.)
That said, though, you basically seem to be hesitating between a source and an amplifier upgrade, and you have IMHO correctly identified these as the weaker links in your audio chain.
I remember my experience auditioning Linn Keilidhs biamped and single-amped. To me, one LK140 in a passive setup sounded better than two LK85s in active configuration. I conclude that one great amp will sound better than two ordinary ones.
It's a hard decision to make. You will either have to give up biamplification or spend for two amps, but I would change the amplification first. Get the very best you can, then look to your source. But don't upgrade until you can afford what you really want.