The stock Mya hose for my Bambino is pretty nice. It doesn't have quite the ease of pull of the Nammor and Mya hoses are not washable, but it is a nice hose nonetheless. Sometimes I prefer the Mya hose over the Nammor when I smoke from my Bambino.
As far as the bowls are concerned:
Vortex (with cross-sectional diagram!)
The idea behind the vortex is to keep the shisha juices in the bowl instead of running down your stem, producing longer, better sessions with more flavor. In my experience, anyway.