The Porsche is still lurking around (It's on my avatar now). I took a break cause I had been working on it for months and was tired of the same model. I had an animation in mind for it, but it would be a huge rendering job, so for now I'm going to have some fun modeling this bike.

Visitor is right about the layer manager. I use this big time with all my models. Once your scene starts to get complicated, tumbling in the scene window is like moving in slow motion. Turning off some of the complicated layers while you work on a single object can really speed up the user interface.