Re: Speakers
I run a 210H through V30s. No brightness issues here.
I'd expect your speakers aren't broken in yet, and I would suspect your guitar/pickup may be clashing with the speakers.
Place your cabinet directly on the floor, no casters. This will improve perceived bass response.
Boost the JVMs resonance dial too. It won't get muddy.
I also suggest running the master volume high and the channel volume low. This will give you a thicker sound.