I came very close to settling on Mills wirewound resistors while researching brands yesterday. After reading in a couple of different DIY threads discussing the "sound" of various resistors, that the Vishay Dale resistors are "silent," having already seen them ranked high in similar threads, I decided to go with Vishay Dale instead of Mills. Truth be known, they're indistinguishable to my ears, but I'm not going to spend money to find out.
In fact, rather than follow the sensible advice to order an assortment of values that can be ganged, having more patience than a desire to end up with a pile of unused resistors, I've only ordered two 50-Ohm 10W 1% Vishay Dale wirewound resistors to start with:
For my quest, if this kills the hiss from my MG3 to LCD-2, I'll go to a lower value to see if I can still avoid hiss with yet a higher voltage output. If not, I'll got to a higher value. One step at a time. Slow but sure.
I dunno, I think you need to have a pile of unused resistors. Unused resistors are fun. For instance, you could solder unused resistors into a sculpture of some sort, perhaps calling it "pile of hotdogs"or "pack of wild dachshunds". You could then sell your artwork for big bucks to finance your next portable gear upgrade.
I also think doing this testing one step at a time, slow but sure, is just not good enough. You need to try to test everything at once, using a lab full of calibrated test equipment, and about 20 assistants in lab coats with "ZilchLabs" and their names stitched over the pockets, all of them setting up and monitoring the equipment, testing it constantly to ensure perfect level matching, with you in a remote location to ensure that you can't tell when they are switching ANYTHING in the system. That way you would have a completely blind setup. If you don't do all of this, your results will not be valid to anyone but yourself. And you shouldn't be so selfish about just trying to upgrade your own gear, when the Nobel Prize committee is waiting for you to complete the grand experiment that will save all of humanity.
Okay, that's enough ranting, now back to preparing for my comparison of every single DAC on the planet, because everybody on Head-Fi seems to have different ideas about what should be in the field. But that's a discussion for another thread.
By the way, here's my highly trained lab team: