So my wife got me a $200 gift card for my birthday to my local home brew shop. This got me thinking about what I might need for my setup. I have a KAB-4 propane burner, a cooler mash tun, a basic keg system (want to build a keezer soon), but I'm realizing my brew kettles are inexpensive aluminum kettles that are somewhat hard to clean, and don't have a sight glass, thermometer or valve at the bottom. I'm considering a good brew kettle is probably the logical next piece of equipment. I brew 5 gallon batches all-grain. I'm looking at a Blichmann Boilermaker G2 kettle, either 7.5 or 10gallon. Does this seem like a good way to go? Which size should I go with? Also, is the auto-sparge system worth it? What other accessories make sense? Any help is appreciated. Thanks in advance.