I'm getting FTTC in a couple of weeks after years on ADSL, (Yay, from 49dB to cabinet about 300m away

My existing setup is an ADSLnation ADSL faceplate that must be approaching ten years old, but as far as I know is working fine. I get 4Mb'ish at the moment.
Two things are giving me pause, one, there doesn't seem to be an official BT source of these, and two, the thread below this one that I've just browsed doesn't exactly seem full of praise for the NT5c...
Any recommendations for where to get NTE5c, or should I just stick with what I've got.