Which solid subframe bushings to buy?

[Musclerodz]

I know there are sevral companies offering solid subframe bushings but I am not sure if any brand is better than another. Do any of them innerlock (sp?) differently than another? I am considering machining them myself as they are about $10 worth of material. I really don't like the aluminum ones due to high stress loads especially in a turn, and possibilty of corrrosion over time. Steel would be much better and it is what I prefer to use. What are your thoughts?

Mike