I have thought about this somewhat. We have two couches, and I'd like to replace both. Here is what I have decided, with my own personal logic:
-For me, I am picky with how it "feels." I have a bad back, so I need something that won't "break in" quickly, and is somewhat firm/springy. And I can't afford to spend a lot of money on something that may start to sag in a year or two. I *would* go totally green, but I am too worried that in a few years, it'll be worthless for some reason (it will sag, i'll be sick of how it looks, or I'll discover something wrong with it health-wise, like I'm allergic to latex , etc) so I am not really willing to spend more than, say....$2500 because of the '"what if's"
-I have done some research on flame retardants. Basically, I feel okay about what's out there "now." As in, since 2005. Bonus points if the couch is leather or a leather-like substance, because even less chemicals will come out of it from the foam. I also feel (my sense) that certain microfibers may be dense enough to prevent chemicals "puffing" out from the cushions, and even though some of those fabrics are considered "stain resistant," they aren't treated with any chemicals....it is just literally the tight, specific weave of the fabric itself that repels liquids (of course, double check). So that tight weave makes me feel more secure that less chemicals are coming out. That, or leather. And if it isn't the high quality leather, it is isn't always expensive. I am currently looking at www.modani.com, they have some cool leather stuff that is affordable.
Anyways, the flame retardants that are now illegal to be used in couches sold in the U.S. (since 2005) accumulated in human fat. The ones that are legal now, to my knowledge, do not? So I figure worst case scenario, if I come in contact with something, at least I am peeing it out, and it isn't accumulating in my body, and my breastmilk. That makes me feel better. That is why I'm so anxious to get rid of the couch I have now.....it's old, and the longer I have it, the more is accumulating in my body. Luckily, I bought my mattress in 2005.
I am also very aware of whatever flame retardants will be on the next TV we buy. The flame retardants that accumulate in fat are still used in electronics. I think they are being phased out soon. Whatever they come up with next, I'll just try to manage the dust in our home. Also, not eating a lot of animal fat helps, because those chemicals end up in fish and chicken and full fat dairy, etc. Nothing we can do about it. :( So even if your couch is fine, it's still in your food. So I'm just doing the best I can. Not sure if that helps at all, but that's my logic. Good luck!!!!