Hi everybody! Just bought a Axe-Fx II after previously owning an AX8. I play only at home through a pair of Presonus Eris E8 studio monitors. Question is should I invest in a subwoofer to complete the setup or is that just a waste for guitar? The vast majority of what I play and listen through with the monitors is Metal. Some favorite bands are Dream Theater, Allegaeon, Nevermore, Opeth, Megadeth, Metallica, etc. I would purchase either the 10 inch Presonus Tembler or the 8 inch version. Thanks in advance.