For the free one, go to the store home page, click on V3 Mix Libraries. Then click the "HERE" located next to the picture of the microphones. The download button is on the bottom of the next screen. It's a good way to see how the packs are laid out with individual mic's and mix files as well. You just have to import the ultra res files with Cab Lab.
You might like the Mesa cab with the V30 EN 08 speaker. That's one of my favorite speakers, and it sounds great in that cab, the Bogner, the Checkerboard Marshall, Diezel.. The fun is getting to experiment.
People love OwnHammer packs and people love CK packs. They're both great, but sound very different, so it's just a matter of finding what works best for you.
Happy tone-hunting!