I'm looking to upgrade my ignition system but have found that MSD is only company that makes "performance" coils for the Hemi. Is there any other brand out there that I haven't found yet? I'm looking for something better than stock and the MSD's are a tad on the expensive side, not saying I'm cheap but $500+ sounds a bit much. Also will I have to get better spark plugs to handle more 'spark' or the stock ones fine?