Ethernet

I am adding a HiFi Rose RS 130 to my set up and need to split my ethernet cable run...  Here is my question:  I have about a 20' run into the splitter , then 2 x 3' runs to the RS130 and a BluSound Vault.  I have been using a $20 ethernet Cat 5 cable on the BluSound Vault alone.  I am seeing (typical) ethernet runs for $7,000 to $1.50.  Where do I go here?  Primary goal is to make sure all 3 runs are identical and really NOT thinking of spending a ton here.  Thoughts?  Cat 5...6...7...?

Help !!