There's many options for gear out there. Light weight and mobile or robust and heavy as hell.
A 17" MacBook Pro would be nice, top of the line with a APC20. You'd be able to fit it all into a single backpack and perform on a single 1080p projector flawlessly.. maybe 2.
A tower is more my style, although heavy. Paired with an APC40 and a 24" monitor keyboard and magic trackpad. I'm able to haul it all around in a large suitcase. Wrap a towel around the screen and tower for protection. Also a backpack for cables, stingers, adapters etc. I leave my ipad and mac book air at home, keeping it simple helps keep track of everything.
What do you bring?