Feb. 2010 update.
In late 2007, I ended up selling the VSA speakers and buying demo Silverline Sonata III loudspeakers, which were close to my $3000 budget, and indeed went below 30Hz. Nice as they were, they turned out not to be as tube friendly as I had hoped...at least according to my listening preferences. The tonality with tube amps was always tipped up. In fact, after several months of "amp try-outs" I purchased Pass Labs XA-60.5 amplifiers. Outstanding amps that drove the Sonata III tremendously well, but not the low power tube amps I had set my sights on.
In late 2009, I sold the Sonata III loudspeakers and purchased Audio Note AN-E SPe HSE loudspeakers. 98dB/8 ohms. Bass extension to 16Hz, according to the manufacturer. I have not put a decibel meter on them to test the frequency response, but I'll venture it's down significantly at 16Hz. In any case, bass is natural, and the overall balance fits the listening space better than any speaker I've owned. Present amplification is George Wright Signature AU-15 tube amplifiers. 15wpc, 2A3 push-pull. They are a screaming bargain at their used prices. Retail was $3995 before they were discontinued due to George Wright's passing.