the only problem with any kind of hose is that you need to attach it to your cabinet and the gun, yet still leave movement available for the gun or hose to rotate.
my money is on the braided hose. you may be able to find a fitting for the line that you can attach to either side...a fixed fitting for one side and a rotating fitting for the other.
the reason i mention this is because if you've ever had a hand held shower head and had the head turned out of place...trying to use it is really frustrating because it wants to stay straight. What happens when you try to straighten the head is the hose resists, gets kinked. The same thing happens with guns.
I've played gun games where the gun hose has been replaced with something like hydraulic hose or even a proper gun hose, just improperly installed . You get the gun in one position then you try and turn the gun and the hose is pushing back, and it's not fun. You spend half the game trying to twist and turn the gun to try and figure out what the deal is with it.