Upload & Sell: On
The L-608 ... has 1 degree spot variable to 4 degrees, incident, flash, combined, memory, pocket wizard module option, etc. Not necessarily what the OP needs for his intended purpose, but a bargain compared to the L-758DR I'm sure, and "bang for the buck" is one of my better finds.
Not sure what more the L-758DR might have ... but I can't think of anything more that I'd want / need.
But, hey ... I'm a fan of "last year's Cadillac" ... If it was "world class" last year, what makes it any less so this year just because something else has come out with more bells & whistles or prettier paint? It isn't like light has changed much over the years.
That being said, some would consider a used Minolta Flashmeter to be like a used Rolls Royce.