You guys realize that you probably aren't "tasting" anything in the steel, because alot of the pipes for city water are steel. A lot of well owners have steel as well. You might be aclimated to the taste.
Aluminum is in just about everything, including a pretty large amount in the soil. What you are probably tasting is a the oxide when you boil. To date there has been no study to prove its harmful, and is probably less of a issue then iron rust to the system.
I am not condoning AL vs steel, but it seems alot of you are scared of issues that don't exsist.
Personally I have a steel one because it was cheap, and debated about titanium for its durability.