Scaling our install (moving to NTA 4.1)

Our install looks something like this:

the main app server is running all of the netflow, web, and NCM processes; the additional pollers do almost all of the UDT and NPM polling

I'm evaluating moving from 3.11 to 4.1x and scaling our install to deal with about 150,000 flows per second.

a) can I move the netflow listener to a dedicated box or can i run additional netflow received on the pollers to boost the receiving throughput?

b) that works out at about 1.2TB of storage for the flow data; does the product do sharding across multiple disks, or do I need to do that at the controller level?

c) do you think I'm crazy to try this?

if you've a large NTA install I;'d be interested in your experiences.

thanks