I'm a heavy D'Addario user too but whenever I can round up enough money I get a set of Elixer strings. They're the best kind out there. They don't corrode until you've used them heavily for many months. They're coated with a special sealant.
I used to break strings almost daily when I started but then I switched to D'Addario and that changed. I have only tried Fender's strings a few times and I dont think they are all that great... plus they are more costly than D'Addario. I'd recommend D'Addario strings to people who have corrosion problems and if you can afford it, try Elixer strings. You won't be disappointed. Thats all I have to say, just thought I'd give my opinion :-)

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-ejd

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