Half a Project Completed, But New Yarn Beckoning

I have half of a pair of socks finished, i.e., one sock. But when I went in to the LYS yesterday, new sock yarn shouted out to me, "Take me home!" And I did. And I want to start knitting with it, but I have NEVER started a second pair of socks before I have finished the pair OTN. The problem with starting the second sock is that I will have to unwind the ball to find the proper color to start with in order to have even remotely identical socks. But I'm lazy, so maybe I will just make fraternal-ish socks. Decisions, decisions.....

The new yarn is Paca-Ped H-T, color: Carribean Chocolate---YUM! It is a superwash Alpaca sock yarn (100g hand-dyed) with 25g. of co-ordinating heel & toe yarn for reinforcement. The yarn itself is from Peru, but it is dyed in the US. It is so soft that it is now my new favorite sock yarn---until the next new yarn at the LYS shouts out to me.