crunchbox? seekstomperz? as stated in 1 thread... i forgt which thread...
you are trying to emulate a perfect amp head sound using some pedals? i dun believe.. hehe
definitely- you can't get an amp's dynamics from the tone, but there are plenty of emulatirs which are above-average.
what aspects of the JCM900 are you attracted to (before i mention the wrong pedals)?