I've been testing several engines and currently have A6 commercial and plan on upgrading to pro once I've completed my first level and like how it looks running 3DGS. I'm building my first level in several engines and then will decide from there. So far, I'm most impressed with A6.

I've been browsing thru the physics forums picking up tips and hints on getting started using the physics.

If A6 has it's own physics engine then why the Newton one http://physicsengine.com/ ? Or is the Newton one for people who have the commercial edition who want more than one object at a time? If I upgrade to Pro (I won't be upgrading just for the physics) the would I need the Newton?