If your lights aren't dimming there's no reason for a higher output alternator. Do you do burps or anything SPL related? If not...don't get a new alternator. You won't see a difference in anything at all.
I guarantee you that you're setup isn't sapping enough power on daily tunes to necessitate a new alternator. If you're having any problems at all find a buddy who has something better than a ryval and try that amp hooked up in your system. If you have light dimming issues it'll be resolved with a better amp.
