I was just reading the release notes for the FW 13 upgrade and now, in addition to the original SVT, they've added a Bass400, Orange AD200, and a Fractal bass amp model. I'll give them a whirl later today. The Fractal guitar amp models are really cool - they do idealized versions, things you couldn't do with a typical amp, so it will be cool to see what the bass model sounds like. Among a bunch of other updates, they have now added the ability to change the power tube type - EL34, 6550, KT88, etc. Should be a lot of fun experimenting.