Thanks Delmar, i think.
"My burning question is, how good are these "treated" synthetics? Because if a treated synthetic actually worked, I'd buy it."
I don't really know, as i have a lack of experience with treated synthetics comparatively. As far as hearing things and reading, what i've heard is that they really vary from product to product. I've heard a lot of treated stuff eventually will get overwhelmed on a truly long trip, or the properties will eventually wear out over time, use, washing, etc unlike say merino or linen.
Again, i don't know for sure, but if i was doing a long thru hike, i wouldn't primarily rely on any synthetic baselayers--have a lightweight synthetic backup yeah, but not my primary.
Some folks might scoff at even caring at all about stink, etc, but personally, it's not so much the stink itself that's the issue, it's the hygiene aspect. Bad stink indicates build up of fungus and bacterias that are un-hygienic in nature. Having once had a chronic jock itch infection, i can tell you it's not fun especially not when you are on a long backpacking trip. Well, a truly hygienic fabric on your skin, like merino or linen, will go a long way in helping to avoid skin issues like that. It's a nice side benefit though, that it won't stink to high heaven.
Anyways, i think i mentioned it earlier, but with my limited experience so far, i've found dri release to be decent. Not as good as high percentage merino or linen in long term stink control, but pretty decent especially for shorter trips and the great thing is that it doesn't cost an arm and a leg.
You can get a good dri-release T-shirt on STP for like 10 dollars with one of their coupons, it's the Terramar brand one. That's the one i have, in color white (which unfortunately they don't have any more of).