1. Yeah, I know the pads WILL affect the sound (unless you have some of those crazy electrostats that play well with anything), I'm just hoping that maybe these specific ones don't affect it TOO much, or maybe even improve the sound a bit. That's wishful thinking on my part, probably, but I'd much rather experiment and fail with a set of barely 15$ pads that I can keep as a spare (provided they fit) than a pair of 50$ ones. Not to mention that some of those more expensive pads are so gloriously comfy that I might even be tempted take the hit on sound quality. At least the stock pads are nice enough when the clamp is tamed after a while!OK. Here's my thoughts on your queries;
1 New pads: Any new pads will change the sound signature of the headphones, how much it will affect it depends on the pads of course. Fingers crossed someone out there has tried the WS1000is pads and can give you their thoughts on them, otherwise it's guinea pig time!
2 Schiit Stack: I have the Magni 3 and Modi 2 (with standard DAC) stack. Power is clean and plentiful. You can run them on low gain at around 12:00 to 1:00 or on high gain at around 9:00 to 10:00. The power of the Magni is more than enough and it is not a concern at all when paired with the MSR7. Does the Schiit stack make a good pairing with the MSR7? Yes. The sound quality is a step up from a PC onboard DAC / amp combo. To me the Schiit stack gives my set of modified MSR7 cans more texture, more bass extension and clarity, more silky / velvety highs. It makes the music you play more liquid sounding - it all sounds smoooooth with slightly more definition. It's not a HUGE jump up in sound quality - it's not night and day different. It gives more of a nuanced and well polished sound to your music. For approx. US$200 it's a no brainer. You might have to wait until the new year as Magni are backed up in orders big time.
2. You got me wrong, I know the Magni has enough power to drive the MSR7. Hell, even the Q1 has more than enough power, and it's a portable tiny amp that's not very powerful even by portable tiny amp standards. What I'm asking is how the MSR7 play with moar powah! I certainly don't need them (or want them) to go any louder, I can use them as small ~0.2W speakers with the Q1 as it is at its loudest settings. But I guess if the bass improves and the presentation of the sound is smoother/less edgy, then it's a good pairing, because those are the MSR7's weaknesses, a slight lack of bass and a slight harshness to the sound sometimes. Or maybe that's because of the dac, I dunno (isn't the AKM4490 supposed to be more musical sounding and less analytical that the ESS DACs? Is the regular Modi 2 even using that?). Still, you answered my question and gave me your approval, so thanks for that!
3. You got me curious, you mentioned modding your MSR7. What sort of modding? And to what end? What were the results? Let's say you piqued my interest now... I've read some people online remove the felt ring around the driver housing on the M50x with some success. Maybe something similar?