Hahahahaha, no, I'm not from Australia. I'm actually from Greece. I've just picked up calling people "mate" along the way, especially when writing. Although now that I think of it, there's other stuff I'm used to saying that can be misinterpreted like this.
As for the 58x, glad to hear everything you had to say. As, for now, my only amp is a Fiio Q1, it's not like I can get cans that require a lot of power without then spending more on the amp. I was eyeing either a pair of Fostex T60rp or Argon MK3, but these would cost me roughly double what the 58x cost, which is money I can't lightly spend right now, and I would also have to get a beefy amp to get them to sound right. The potential for the 58x to sound great through my little Fiio until I can upgrade that excites me! I'd still get them if that wasn't the case, but it's even better this way.
As for the MSR7, do try the mod. It takes 10 minutes after you get the pads (don't try with stock pads, not great results with those) and the sound is magnificent. Stock, I found them quite good for what they tried to be, portable, closed, easy to drive, detailed. But they had their problems. Modded though? They are the best closed cans I've heard up to the EL8. Granted, it's not like I've heard everything out there, but it kicks some serious ass and I didn't know these things had it in them. That's what the MSR7 should've been stock, IMO, not to mention the M50x and such.