I've had very good luck with the Camco blue water hoses.  Forget the cheap hose from Walmart; I've thrown away a couple of those. They kink so bad they're virtually unusable. 
I bought the Camco 20 ft. hose that breaks down into two 10 ft sections which I found to be handy if you don't have to go very far with the hose. They don't kink and they're very heavy duty.  Would definitely buy this one again.
I could not find that 20 ft. one anymore on Amazon but it looks identical to the 50 ft hose posted in this link and they offer it in a 25 ft too: 
CAMCO RV FRESH WATER HOSE