I'm not familiar with that turntable, so am not sure how good it is. Your money might be better spent on a new cartridge and a phono stage.
If you're using the phono stage on the carver preamp, that is probably a weak link. Something like the Hana SL and a Parks Puffin would be under your budget.
You should also listen to some other subwoofers before adding another Sunfire sub. I had one of their 8" "true subwoofers" a long time ago and it sounded like a little fart box compared to other subs I've owned. Maybe their newer ones are better, but even if they are, a bigger better sub (or multiple subs) will be a lot more "metal" than that little 8" sub.
Unless you want a certain kind of look for your turntable, get one that will sound best with any kind of music. If it will play classical or jazz or hip-hop and sound good, it will sound good with metal.
Some used turntables that fit in your budget and maybe leave some money for a phono stage - Music Hall 5.X or 7.X, or a Clearaudio Emotion or Marantz TT15S1.
As others have mentioned, isolation of the turntable is important if you want to play loud.
You should also listen to some other subwoofers before adding another Sunfire sub. I had one of their 8" "true subwoofers" a long time ago and it sounded like a little fart box compared to other subs I've owned. Maybe their newer ones are better, but even if they are, a bigger better sub (or multiple subs) will be a lot more "metal" than that little 8" sub.
Unless you want a certain kind of look for your turntable, get one that will sound best with any kind of music. If it will play classical or jazz or hip-hop and sound good, it will sound good with metal.
Some used turntables that fit in your budget and maybe leave some money for a phono stage - Music Hall 5.X or 7.X, or a Clearaudio Emotion or Marantz TT15S1.
As others have mentioned, isolation of the turntable is important if you want to play loud.