I know that there are alot of posts about what people use for editing but I just need some clarification if possible.

I have been playing with lightroom and its been doing a great job but I was looking at heading into photoshop, I have played with is before, nothing major just tinkered away.
I started looking into it for a while now but the CC has got me confused, Do i need to have a yearly subscription?

On another note what are some recommendations for editing programmes? Im looking for something other then what comes with my camera. I am using a new iMac.

Thanks