The B2003's emulation is very good, but lacks a Tube type of sound. The OD, and Distortion is suitable for drawbars, but for other instruments inputted it sounds more like a dual phaser w/ small depth amounts.
The Tube Taper really has that bubbling warm sound w/ lot's of low end tweaks that have added the fullness that was lacking in the B2003's parameters. Just adding Bass and ODrive isn't the way. Tube Taper is though.
The reverb is a nice Mesa Boogie Tweed Impulse made by Brotha' Man Synthetic, who is a member here, and part of the Gigastudio development team.

Just a live stereo VDAT take, but the results of this combination was worth the time spent.