How much is too much to spend on a phone

I will buy the phone outright so I won't owe anything on it, the phone I'm looking at buying would be equivalent to my 6 week emergency fund. I use phones heavily (I don't own a PC so phones are my PC) and will keep a phone for 3 to 5 years. This phone has everything I require. I intend on waiting till black friday so it doesn't cost nearly as much