Re: 6.5/284 vs. 6.5/-06
They are for the most part, the same thing, but the 6.5-06 is a long action number and a 6.5-.284 is a Short action cartridge. Both have almost the same case capacity. A 6.5-.284 is some what limited to bullet length if in a short action, however if loaded in a long action, it doesn't matter.
The 6.5-06 can have issues with bullet length in a long action, but it's a rare thing.
Load data is interchangeable because they are so similar. If you throw a 6.5-06 Ackley Improved or 6.5 Gibbs you have a diffrent story. They are faster.
As far as accuracy is conserned, that depends on the rifle, the reloaders ability and the nut behind the trigger. Some say that a short action is more accurate, but I've seen some really accurate long actions too.
I've been looking too and I settled on the 6.5-06 AI. It looks fun to me. Should be done by mid May at the latest.