Well, after reading that review on Headfonia, it seems that they'd be quite the upgrade considering they compete with the HD800's in terms of clarity in detail. I'm not really THAT much of a basshead, really; I just want something that's clear and concise in terms of bass hits, but with a little more oomph than the HD555's.
As for the audiophile hobby being an expenditure blackhole, you got that right. I borked my system when trying to install an Essence STX, so now I'm out of a computer too

But I'm looking at this on the bright side; at least this means I now have a reason to upgrade