Currently I brew extract batches in a 5 gallon pot. I end up with about 3 gallons of wort which I then add tap water to bring up to 5 gallons. I'm thinking about getting a 7.5 gallon pot so I can do full wort boils. Are there any advantages to full boils vs what I am doing now ? Disadvantages ? I imagine it takes alot longer to cool the wort but I have a wort chiller.