you should have no problem dialing in great rock bass tones with that setup; send the XLR straight to the soundguy, and use the 1/4" to your amp; try using the effects return or "power amp in" on your bass amp, to bypass the amp's own preamp and just have the VT as the basis for your sound. you could also skip the "bass amp" entirely and use a regular PA power amp (that's what i do with the sansamp BDDI).
a better pickup would be cool (duncan vintage, fender original 62) but even the stock unit will do you well.
Guitar Repair Gnome
Alpha Music, VA Beach