Ah, the on going low volume br00talz quest.
I more or less gave up. Things that I use for it that I dont utterly hate
Peavey bandit. If you can get hold of one, this is what I have in the lounge as a practice amp. I use it because of all the setups I've had for low volume metal tones, its the one that gives me the least of the problems I usually have. Its not horribly fizzy at low volumes, its got decent thickness and kick in the low end, it doesnt have a grating, empty mid. Its hardly a boutique amp tone, not by a long shot, but its what I've settled on.
Also rans
Powerball. Yes, engl powerball. It sounds the best of all that I've used at talking/whisper volume. But its impractical and pretty much entrenched in the studio, and I dont need to be quiet in there.
Roland cube 30. This is probably in second place, nothing terribly wrong with its low volume high gain sounds so long as your expectations are realistic, but its a bit flat and fizzy too.
ADVT30XL. Decent when cranked just a little bit (have to raise your voice over it type volume) but leans toward grating and harsh at very low vol.
Vypyr 30. Good when cranked more than a little bit (getting on for shouting over it volume, loud hifi type levels), but really thin and clangy when quiet. Also, dreadfull master; the difference between silent and really quite loud is about 1 arc second.
Pod into monitors (adam A7). Ewwwwww....never got a sound I liked out of that, ever. Buzzy, dynamicless.
Vox TL LE into monitors. Better, responds to dynamics well and its surprisingly unfizzy/thick but it was hard to get a crisp attack out of it; always quite a dull, loose sound.
Pod into bandit and vypyr clean. I liked the bandit and vypyr on their own better.
Overdrive pedals into bandit, vypyr and advtxl. Alrightish, but noisy, and messy. I liked the amps alone better.
That more or less covers it. Like I said, basically happy with the humble bandit, which I got for a tenner, over everything else I've tried. Dial it in carefully and it gets me by.