My band is going to start playing shows soon so I need to upgrade my equipment. I was looking at a Gallien-Krueger amplifier rig at a local music shop near my house. This is what it is: Head: GK Backline 600 http://www.gallien-krueger.com/products_bl_hd_600bl.html Cabinet: GK 410 BLX http://www.gallien-krueger.com/products_bl_ca_410blx.html I play heavy metal/thrash. Do you guys think this will work well for me? Oh and by the way, the guy is offering the whole rig for $600. Is that good?