I was looking at that too. I've been out of the game so long, it's hard to keep up with all the advancements.
In particular, it's hard to find guides made RECENTLY that include all my options; I always hate making new threads but it feels like the smartest idea, because there are so many knowledgeable people here who can just tell me/redirect me!
Another place near me has Cubic Ninja for 35, and I've got about that much in store credit! :-)
10.7 is fine. I got one of those and installed A9LH on it this week. You don't technically need Cubic Ninja, it would just save a little time and trouble when you have to use browserhax initially instead. Take a look at the Plailect Guide.