I was in Amsterdam in June, and my personal favorites are G13 Haze from Barney's, Hawaiin Snow from Greenhouse, Arjan's Ultra Haze #1 from Greenhouse, Blueberry Ice hash from Noon, and Northern Lights x Haze from Kadinsky. My top three coffeeshops in order are Greenhouse, Barney's and De Rokerij (there are a few but I'm talking about the one with the cool dug out lights and buddhas on the left wall). I would also highly reccomend going to a coffeeshop called Abraxas, theres a comfortable couch area and good music and its my favorite coffeeshop there. Make sure to check out the cannabis college also, that was cool. Have a great time.