I've been printing on Epson canvas for as long as I've owned an Epson 9800. The first canvas I used was Epson Premium Satin that had a base weight of 350 gsm (grams/sq meter) and 19 mil thick. I was very pleased with the canvas in not only the image quality but how well (and easily) it stretched.
I've seen images Ken has printed using Lyve and they are stunning.
So good-bye Epson canvas.
Update January 12th - Added a link to Breathing Color. Also need to say just how impressed I am with the customer service there.