Just purchased the vArranger and enjoying it.
And guess what? I don`t own a sound module

Yes, I am playing it through a softsynth viz. the Yamaha SYXG50 softsynth on my MIDI OUT. This has the XG soundset and the PSR styles do sound good when you consider its a soundset which is more than a decade old !!!
I`m sure the output from the vArranger would sound at its best, if played through a more recent sound module like a SD2 or SD-50 or even a Bk-7m.
The vArranger is an awesome piece of arranger gear. Its almost Apple-like in its clear and simple user interface. The vArranger being able to play Roland styles is good leap forward!!
And of course, with Dan`s great support which I experienced first hand today, its definitely a very good investment to go along with your other hardware arrangers.
Merci Beacoup Dan !! Keep up the good work