I can't really comment on the EMS bags, since I've never used them or known anyone who did. (Ohio is a bit outside EMS' customary market area.)

If you want really good, really light down bags, take a look at Western Mountaineering or Marmot. Their lightest bags are the Extremelite (WM) and Element (Marmot) series; they are, naturally, the most expensive. But both also make less expensive (and heavier) down bags. My first choice would be anything from WM, but that's a personal preference; I've used a couple of the Marmot (Hydrogen and Helium) bags, and they're good, too. They're outside your price range, but if you can get past the cringe factor, you may never need to replace them, so they may be cheaper in the long run.