Just read thru this thread and am still a little confuse on versions required.
1. What version of stream is required? 2.1 only?
2. Does stream need to be V2.1 for linux too?
3. 10.11 catalyst driver needed for windows?
4. What ati drivers are needed for linux?
Im finding it hard to find a clear walkthru or setup options for this miner... can anyone help?
Thanks!

2.1 runs fastest and doesnt have the CPU use bug. You only need 2.3 on 6xxx hardware. Yes, you need it on Linux too. 10.11 runs best on Linux and Windows.
Any instructions that require using AMD's packaged version of the drivers are wrong and should never be followed. Please only use distro packaged drivers for fglrx.