I'm wondering if anyone has a better solution for this combination of gear to achieve a really good acoustic tone.  I have had some success using the Double Vib model at a very low gain setting and then tweaking with some EQ on the HD500, but it's nowhwere near the clarity and realism I get by using no model at all and going directly into the PA or using an FFFR amp.  The hitch I'm finding with giong to the DT-25 is if you defeat the amp model on the HD500, the DT-25 automatically switches to the topology already selected on Channel B, thereby defeating the intent to play acoustic using no amp model.  Anyone have some success stories to share?  Thanks!