Under what circumstances do you care about the location?

When I'm using cloud GPUs it's pretty much a batch job, and latency is the last thing I care about.

I'm not aware of any DL projects in Australia on health images which may have some legislative requirements about keeping data onshore.

Data transfer between EC2 and S3 in the same region is free but incurs costs between regions.

The projects I'm working on unfortunately do; less legislation directly though and more extremely exacting regulators.

More selfishly, I game using parsec.tv and would love a new rig, and it's pretty latency sensitive! :)

They definately do, only the p2.xlarge though I think.