I currently have a Berg NV610, an SVT pedal, an SVT VR and a Markbass head so I can comment from current experience on this. Put simply, the Markbass sounds good and can get some grind with the VT pedal if you want it but it simply does not come close to the feel of the SVT. The tone can get someway there with the VT pedal but you simply cannot get the feel and response without all those tubes. IMHO, of course.