Steels are good in that they are cheap, and come with good backspacing to accomodate larger tires.
There downside is that they can be prone to bending if you are really hard on them, and are somewhat heavy. But then again, its 60 bucks for a new one.
Aluminums are less prone to bending, balance better, are lighter, but are way more expensive.
So its a toss up.
Most of us do go with steelies though because of price and availability.