Thanks for posting the pics.
You're the first person I've seen with white Miracles, and they do look nice. I can't make out much of the detail in the drawings, but they look like they've been done nice and crisply, with good contrast.
I ordered mine in high-res monochrome, with smoked shell and red&blue tips. I hope they turn up soon - after just over 10 weeks, I'm really wondering if I'm ever going to receive them at all.
I hope you find some resolution to your 'heartbeat' and microphonics issues, as you seem to really rate the sound quality of the Miracles.
Purely in the interests of experimentation, perhaps you could try applying 'Blutac' to the faceplates of the IEMs and also some around the cables, near to the IEMs. I doubt it'd do much to reduce the sound of your heartbeat, but it'd be interesting to see what effect, if any, it might exert upon perceived levels of microphonic noise. I appreciate the Blutac will look unsightly - I'm not proposing it as a permanent solution, just as a means of exploring if you can positively affect the some of the noise you are currently finding distracting.
For the cable microphonics, you could alternatively experiment with applying a section or two of silicone tubing around some of the cable. I'm referring to the very flexible small-bore silicone tubing which is commonly used as a fuel line in 2-stroke and 4-stroke engine powered radio-controlled model aircraft and 2-stroke 1/8" scale model buggies. If you cut a section of this pipe through one wall of the tubing, along its length, it'll then be very easy to slip it over your IEM cable. The silicone may perhaps reduce a significant amount of the microphonic noise through the cable.