In article <545spn$3f1@nntp1.best.com>, marcus@vestek.com says...

>Thanks everyone for the information to my post. I also got a bunch of
>email on this subject and also spoke with someone at Sunpack. The
>consensus is that the Sunpack 444D flash system with a NE-3D
>dedicated adaptor will take full advantage of my F3 and allow TTL.
>The unit costs about $130 mail order which is cheaper than a new
>SB16A (about the same as a used unit) and more powerful than the
>SB17. So I plan to go with this setup.

I would not be too sure of the power differences between these
two flashes without trying both with a good flash meter (guide
numbers are notoriously inflated with many flashes....). And
the SB-17 is a very versatile flash in terms of available
movements.
Hope This Helps