I see all these suggestions for more colors, options on down / etc. While I do see the potential benefit (to sales) of adding a "girly" color option, I do not think that adding stock fill options works as well with your business model of 'tiered product offerings'.
I'm assuming that you still do custom jobs? The "elite" crowd knows what they want, and all the drop-down boxes in the world won't cover all those options. That is the beauty of the cottage industry in my view...agility! Who else could I have called (or emailed in this case) but Tim Marshall when I wanted a 900FP quilt with a 7D shell? You're one of the few guys out there that would even entertain the idea. Kudos for offering that level of service Tim, and don't think for a moment that it isn't appreciated!
If that little blurb about duck down being more water-resistant than goose is true, then it's a hands down winner in my book and a good selling point on the RevX. Offering a more water-resistant down on an entry level quilt makes a ton of sense to me...especially since it gives a bit more fault tolerence for those 'oops' moments that every newbie is bound to encounter. (Like when your nalgene bottle develops a 'leak' when the top isn't tight, or when you bury your face inside a barely breathable bivy during the night and wake up soaked.) Now if only you could get that duck down treated to be hydrophobic on top of that inherit water-resistance...
As far as the Epiphany goes, if you're going to add a nylon strip on the side, why not just do the whole top in a lightweight, breathable fabric (or a WPB/DWR fabric if moisture is an issue)? You'd still get the vapor barrier from the Cuben Liner without the slow loft/dry times (I'm assuming that's what you were shooting for). It could lower the price-point substantially and put the Epiphany more 'in-reach' price-wise (which I think has been the limiting factor on your past model as far as sales...It just cost too much for a few ounces shaved & a clammy sleeping experience imho.)
Anyway Tim, keep up the outstanding work, your products are top-notch, can't wait to see this new Enigma quilt.