Answer, Inon D2000, hands down the winner IMO.
Top and bottom no flash, middle I used the Inon D2000 to try with some success to light up the cigar minnows in the foreground as they trailed off into infnity.
And my response to your edit, strobes have always been high dollars. The internal strobe sorta works as long as you don't use wet mount lenses which also cost a fortune. A "fortune" is a relative term. I bought the little 570 because I did not wish to lug around a honking huge DSLR with all of the fuss and bother and investment in something that is always obsolete the day before you buy it -not because I could not afford the fortune to buy one.
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