hi no money : the easiest solution : - borrow from your dealer both the bal ultra mm2 and the se ultra mm2 (the MF doesnt have a xlr option? many components that do often perform much better in bal mode, but it really depends on how the cdp was designed. this is all beyond my tech knowledge, i always decide by listening) .
i think the commonly accepted rule is that the IC from the source should be the highest quality cable, then the SC, lastly the pre to amp in terms of impact on the quality of the presentation IF you upgrade in phases. sometimes SC may impact more than the source IC, but this all depends on the system as a whole, synergy issues, and of course which components + PCs are the weakest or strongest link in the system.also, many have concluded that well matched component specific PCs have an equal if not greater part to play than ICs. audition widely and intelligently over several days or longer. never go on a 2 day impression. // i think the upgrade of the ultra mm to mm2 is not inexpensive, but still less than the cost of a ref mm1 and the ultra+mm2 excedes the ref mm1 in many important areas. i think it all depends on the capability of your system to benefit from the higher level of presentation.