(3) everything contained in a standard 19 inch rack, therefore the maximum cable distance would be no more than 3m (10 ft).
I need to connect these together. While I could use Cat 5/6 copper I would like to use the SFP interfaces just to dip my toe into the water. I will be adding more network gear at a later time to leverage the 10 Gpbs NICs (Dell/Broadcomm dual port 10G) in my servers. I mention this in case it might be better in the long run to focus on 10 Gpbs cabling.
Based on the research so far it kinda looks like I need:
if you looking 10 GB SFP you need to 10GB which can support 1GB/10GB, so in the later days you can move to 10GB as per the requirement.(rather you invest in 1GB SFP now, later it will be usefull, if you have all requirement 10GB.)