Way to take the initiative. I've owned 4 ubasses and sold each one for either need of quick dough or loss of interest. My fretted microbass is allegedly arriving later today. Pictures to come.
For those who haven't heard petrochemically strung basses....
Uprightish ubass tone: http://www.youtube.com/watch?v=UotbyS_sU3E
Motown ubass tone: http://www.youtube.com/watch?v=9YbKCYKe4jA
Bluegrass ubass tone: http://www.youtube.com/watch?v=-PjpXrXFI8c
: Stock strings on most ubasses.
They're low tension, super stretchy and take weeks, if not longer, to reach stability. They're the smoothest and best sounding option, IMO.
Made my aquila. More plastic than rubber. They're higher tension and reach stability almost immediately. For most people they're sticky to the touch and can sound squeaky when amplified. It's suggested to use some kind of lube or powder with these. The Gold Tone Microbass comes with their version of these, which they don't call thunderguts.
Somewhat a cross between pahoehoes and thunderguts. Higher tension and near immediate stability, but I find them just as sticky. They come stock on the Kala Rumbler, which is the budget ubass at $350.
Aquila makes their own ubass type instrument called the Shortbass. It's strung with "Red Thunder" strings. Very little is known about these strings but they're apparently an improvement over all the available options. So far they're not available for purchase anywhere.