I'd be going EE Revelation XL/XW/0 degree, and an XTherm Large mat.

I have the XL/XW/10 degree, and the extra warmth is worth an extra ounce or two. The beauty with quilts is that you can always push them off or kick your feet out if it's too hot, so there's no such thing as a backpacking quit that's too warm. IME, at least.