I wrangled with Featherind a while back re: getting some down. It was a tossup for me between Downlite and Featherind. At the time Downlite was selling 800 for $80/lb (this was in late July 2012), and I still thought I might get it cheaper at Featherind.
Turns out shipping from Featherind is a beast. If I remember correctly, after shipping their price/lb. is about the same (maybe *slightly* less) than Thru-hiker.
If you want specifics I can dredge up the old email from them, and let you know about shipping. But I'd ask that question before getting too far with them.
After that fiasco, I went back to Downlite only to find that they had bumped their price/lb by 50%, citing a clerical error in their previous listing as the cause for the spontaneous increase.
I think prices are about even across the board as far as price/lb. of a given fill power, at least as far as I found, between Downlite, Thru-Hiker, Wilderness Logics, FeatherInd, etc.