The op’s question is not so much is something better than the Manley - but if it will be a worthwhile and significant upgrade. IMHO when you have a jump in the price of a component you can and ought to expect a jump in sound quality as well - it may expose weaknesses elsewhere - and that’s a slippery road down (or is it up) the upgrade path.
Perhaps you ought to ponder this. I have read review after review saying x is better than anything twice the price - yet at the next price point up they same the same thing about y - reviewers nonsense. In my experience a well matched more expensive is almost invariably better than a cheaper well matched component in a given set up - cables (in my set up) are the exception.
So try and get a home audition and try the Manley out - try a few others and don’t get obsessed with topology and circuit - get what sounds good to you.
Perhaps you ought to ponder this. I have read review after review saying x is better than anything twice the price - yet at the next price point up they same the same thing about y - reviewers nonsense. In my experience a well matched more expensive is almost invariably better than a cheaper well matched component in a given set up - cables (in my set up) are the exception.
So try and get a home audition and try the Manley out - try a few others and don’t get obsessed with topology and circuit - get what sounds good to you.