Re: Differences between hoses
The biggest thing to look for in a hose is the diameter, since a larger hose gives a much easier draw and makes it easier to draw a lot of smoke.
The next decision to make is whether you want a washable hose or not. Washable hoses will likely last longer and you'll be able to clean it, which means that you won't have any residual flavour in your hose.
I'd recommend one of the KM hoses, I've got one of the fancy ones CH had a while ago. It's not washable, but I use it for all my fruity flavours, so that's not a big deal to me. It is, however, absolutely beautiful.
A Razan is probably the hose to go for if you want something washable though.