Y'know what, let me add one thing. These days you never know what you're going to be in for when you roll up to an online community, and though I was pretty confident that Iron Heart folks would probably be cool, well, you never know.
As for the denim, for a little while I thought for sure I'd made a critical mistake. Maybe not an unrecoverable error or anything, but you get the idea. I'm definitely not thrilled with the marbling, but I didn't even realize that was the term for it before I asked. Hearing that everyone makes those kinds of mistakes is encouraging and reassuring.
So thanks again! I'll see if I can't rustle up a pic of my other Iron Heart pair that I wear a heck of a lot more often. I think they turned out pretty well for a selvedge newbie (they are in fact my very first pair).