I'm using a9lh but I'm just curious, because I hear a lot of people saying that rxtools is outdated. What's replaced it?
Your current options for non-A9LH CFWs are Luma3DS, CakesFW, and Reinand. All three of them can be launched from the Hombrew Loader, accessed by a number of entry points referred to as the *hax family.
Edit: A9LH is not a CFW, but an entry point used to launch one. Your A9LH CFW choices are Luma3DS, CakesFW, and SaltFW.