I've spent the last three weeks trying to stumble across a typeface of which i didn't know the name - i found out today that the typeface in question is FF Dax and has a similar cousin under the name of FF Sari.

Just wondering if anyone has any ideas as to the best place to buy this font family

Also, what is the general consensus? Is it already over-used, or is it a viable option for the right project? I think it would work well in a professional context maybe with another, subtle sans-serif based font...

Any ideas would be appreciated!!
Thanks,
Jeremy Green