The Shelby pan seems the way to go, as it's only $10 more than the Ford one. Plus it comes in red to match my car. It's wider and has a small V-cut at the back to get it closer to the tranny. Plus it has the Shelby logo laser cut in the bottom, this provides an exit vent for the air to flow.
Only thing though is bottom these things out on a speed bump, and it will get pretty mangled, although you could hammer it back in shape.