Do I need to roll all OpAmps in my stack?

Hi,

Tl;dr - Do I have to roll/upgrade all my gear for best results, or just my preamp? I'm assuming I do.

I have an FX-Audio Tube03 that I have been hot-rodding. It has been upgraded with Riverstone 5654 tubes, and has been rolled to Muses02 OpAmps and I have Wima caps.
Since then I have added an FX DAC-X6 MkII (upstream of the tube pre, obviously) and an Aiyima 07 for the amplifier (I used to have the FX gear hooked up to an old receiver).
So am I now wasting (or at least significantly losing) the benefits of the upgrades in the tube pre if the DAC and amp are running inferior chips? Do I need to roll both of those, or at least the amp for full benefits?
 
i think as soon a op amp "degrades" the signal while amplifying it then it stays that way


test it! im not exactly sure wether the last opamp has the most influence, maybe its the one that needs the most sinergy with the following amp
i just had simple dacs so far with one exchangeable double opamp without preamp or anything between dac and active studio speakers

the sound differences were rather large imo .. some of the most audible tweaks is op amp changing, so just test it, i can recommend OP1612 and my favourite OP1656 (which runs in a different topolgy than usual opamps, you need to check combatibility) ... burson V6 (and now is V7 out, not tested yet) is definitely worth a try too