best 15 for metal , i have 800 watts to push it with

[spltuscon 10+ year member]

One thing I noticed was that you're running an MTX 801D. I had one of those and I thought it was the worst sounding sub amp I've never heard. Seemed to lack some control and be boomy compared to every other amp I've owned. Power, size and efficiency were all good, but not sound quality.