I just got the fender rumble stage 800 and was thinking about adding an extension cabinet (just because). I know there is the standard 210 that connects perfect to it but I saw its only 700W. The GK neo has 1000W (even though it is a lot more may be worth it to maybe upgrade amp heads?) I dunno I am a novice when it comes to this stuff. Maybe best bet would be to look at marketplace for other cabs or do I need this particular one? Oh and I play in a metal/doom band that needs to cut thru an insanely loud drummer and 2 guitars...help!!