Shiet... I recently replaced my top/bottom hoses that had done close to 140,000km's I replaced them with Gates hoses shortly after I bought the car.
Considering they were aftermarket they have done well. Still felt quite good but worth while replacing while it was apart.
Gates top and bottom rad hoses cost me ~$20 each. Price isn't far off genuine. What was the lower from Nissan worth?
I also refilled with Nulon Green. Top stuff. 90,000kms since I had the stuff in it last. The head hoses etc were perfectly clean.