I know you wanted a one box solution but you seem very happy with your present dac. A small but good dedicated transport is the Project RS Box (don't laugh) and it would be worth trying this. You could also dem the RS dac which I understand has special connect and is supposed to improve the sound.
Also dont audiolab do a nice small cd transport for £400 that is supposed to go with the MDAC ( I know yours smashes that ) Dont know if will go with other non audiolab bits