I use ARHD 12.2, still on 4.2.2, and not even the latest version of it as the latest 4.2.2 ARHD is version 13.4. Very happy with it.
The latest version of ARHD is version 22 (they jumped from version 13 to 20 when leaked 4.3-base came out), which is based on the developer edition's latest 4.3 update.
If you're upgrading now, they took out all of the old versions so version 22 is the only one available for download. It seems to be pretty stable without any problem, especially since you'll be doing a full wipe anyway (you're going to be skipping 4.2 and go straight to 4.3, while it may work, please just forget about dirty flashing, start from scratch and save you potential headaches).
Also, you may want to upgrade your firmware first to the latest. Yours is likely still 1.2x, and currently the latest is version 3.22. You need to do an s-off first if you haven't. Follow the guide on
this thread to do s-off and firmware upgrade, and you'll be golden.