Hey,
I am no mastering engineer, I just do it because the bands I record usually don't have the $ to get it done the right way... that being said, I do mostly rock recordings, and I get pretty good results using the UAD 1176LN cutting about 5db before eq. then a waves L1 Ultramaximizer or the waves L316 for limiting... Sometimes if the mix is too narrow, I will use Ozone 4's mid-side multiband to give more umph to the edges. and if I just need to squash the whole thing a bit, I use waves Rcompressor.
Booyah!