Im currently running a Randy Rhodes style Jackson through a Line 6 SPider II 30 watt amp. Im giving serious consideration to upgrading to a larger amp and im not sure if i wanna go with a Mesa Boogie or a nice Marshall. I generally play extreme shit but also sometimes slow it down with just some melodic crap. I record shitty lo-fi early 90's style black metal quite often so the amp doesnt matter on that, but im looking for a big sound otherwise. Anyone using a JAckson through either of the above mentioned? How would you rate your experience with them?