ADJ recommends Arriba Cases. In my case, I can't agree 100%, but they are significantly better than using the retail boxes to store and transport your lights.
There is a case designed to carry 4 cans on a T-bar, but it won't fit Par64's. Even with the Par64's off the T-bar, it's hard to cram them in there. The best bet for these are hard cases. Some company even makes a fibershell case for these(like you tpyically see with drums). I keep getting ad inserts from Live Sound International for a company that makes cases, but they keep showing my dealer price, and I'm not a dealer, but I sure like the prices. ATA, hard cases, whatever. Lot of choices.
For movers and anything expensive, a hard case of some sort is best.
What are you transporting specifically?