You have good mics. You didn't say what kind of amp/speakers you use.
Multiple tracks is good. Multiple mics is better. Multiple tracks done with multiple mics is best. Yeah, stay away from the center cone position, unless you want the brightest edgiest tone with less low and low mid. Never underestimate the ability of phasing issues to creep in where you do not expect them. If you use two or three mics, then play it back and it sounds lame or thin in ANY way, always suspect mic placement and phasing issues first. You only have to move 1 mic 1 inch in any direction to create a phasing problem. And then the sound will turn total wuss very quickly.
Are you sure you have the sound you want coming out of the amp in the first place? Cant fix it in the mix if it aint there to begin with. Keep in mind that what your ears hear standing 10 or 20 or 50 feet away from the speakers is completely different than what the mics hear 1 inch from the grill. No mic is perfect, but for the most part the mics dont lie. And recording at volume, you cant afford to put your ear where the mic is just so you can hear what the mic hears. Much experimentation is involved.
I would also submit that you will not get the playback sound you want by simply messing with eq and pan settings. You need to mess with phasing if you want to alter the spatial illusion of the sound. Commonly referred to a psycho-acoustics, there are some units that do that kind of processing. I used to use a Behringer Edison, now I use Ozone for it. You can hear the difference easily, but there is nothing built into the mixing board that will do it for you. Phasing issues with mics while recording is your enemy, phasing tricks while mixing can be your friend.
