PS Audio PWD II opinions?

I'm suddenly seeing quite a few of them for sale on Audiogon these days, some at a pretty attractive price. My question is whether this would be enough of an upgrade from my present DAC, (PS Audio Digital Link III with Cullen mods) to justify the expense. Reviews have been pretty enthusiastic, but it's really hard to judge without actually hearing one. Or should I wait a while for a DSD capable DAC, which I think might be the wave of the future? Budget will not stretch to PS Audio's DirectStream DAC.