for a while i was thinking of putting a J-retro into my jazz, and also considered using an MXR M-80, and recently considered building my own stompbox preamp, or an onboard preamp, but every time i get one of these 'great ideas' i come to the same conclusion....what's wrong with just using the 4-band para on my amp? is there some advantage to shaping the tone before getting to the amp? or is boosting the signal a good thing? i'm using emg-j pickups @ 18V. what's the point of spending lots of money for a j-retro when i have boost and cut on 4 bands on my amp? am I missing something here?