I've tried at least the last 10 versions of ARHD downclocked to 1.2, and the latest is the best. Both had the previous radio and the recommended, both worked fine for me, signal, voice quality, up/download speed are almost the same.
ARHD consumes very little power when screen off, but relatively more (compared to stock roms) when awake and using cpu/gpu intensive applications. For office use, you can get two days of battery life with no additional tricks (push exchange + HSDPA on)
Stability: almost zero fc-s, no lags, feels like a well optimized factory rom
From Sense roms, this is the best you can get.