Accuphase or Leben for heavy metal

Neither ,the AAvic i280 is better then them both .

a cass A technologies and Tesla coil noise cancelling technologies.

the one powerful integrated that does everything well. I heard this against the Accuphase 3000 pass labs, Boulder , and several others a bust hear and around $10 k a Best Buy.

Metalhead here about 50% of the time. The other half jazz, fusion jazz, classic rock, grunge, early American/ bluegrass. For me the right combination is a Cary SLI80HS (80 wpc) and a pair of Volti Razz (96db efficiency or there about). For me a system that does everything really well is important. My room is not that big. I definitely get the energy and dynamics I crave. IMO the key was changing to a horn loaded mid that was non fatiguing and listenable for long periods. The Volti fit that bill in spades. 

The Boulder 866 is exceptional. Power doubles from 8 to 4 ohms. It has complete control over my 4 ohm speakers. Good luck ! 

Thank you all and every one for your comments and inputs. Picture is more clear to me now, so will adjust my plans accordingly.

To the people claiming you want a certain class of amp to play "demanding" metal is wrong. I run @atmasphere class D and a tube phono and pre and am completely satisfied with speed and detail. All amps will work, test a few if you can. Oh and I play death metal to grind to hardcore to classic rock and acoustic. All sound fantastic and I listen at around 76db. Avoid advice from those with sweeping generalizations.