Gotta agree with Bob on this. After playing two gigs in the last week with my 'New' RSII, I don't think it's the Holy Grail; merely a nice sounding pickup for a reasonable price. Plugging it directly into the GK MB150 sounds pretty good and is a 'no hassle' solution. I don't need a preamp. It does remind me in some ways of a more natural 'woody' sounding Underwood, although the Underwood may be a bit punchier.
But, I think the price is reasonable and it certainly gets the job done.
My sound is good enough now that I don't worry about equipment too much.