I LOVE the bounce of stretched canvas! I miss it! But I found that panels were more durable and sturdy, and so have been gradually switching over to them over the years. I am 100% panels now.
My favorite brands are Gessobord, and for canvas/linen panels, it's SourceTek and RayMar. I love the oil-primed linen! Sublime to work on! I'm also experimenting with Trekkell brand panels.
I sometimes prime my own panels. I buy unprimed panels from DickBlick or Jerry's Artarama (Trekkell has them too) and then prime them, often with Holbein's Foundation colors. The texture is fantastic for oil painting. Wow.