D70 flash compatibility?

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Well, before I ask my question I should note that I often do things which make sense to me before reading directions. :er: Case in point:
I've been using a Sunpak auto 433 D flash for my D70 without any problems whatsoever. I originally used the flash with my Pentax K-1000, and wanted to try it with the D70. It actually worked! ... and has served me well, until...
I'm trying to find a flash bracket to use on vertical shots with the D70, and tried to find some info in the manual concerning types of sync cords. It says in the manual that I SHOULD NOT be using a non-Nikon flash with my camera :shock:, because a misvoltage could mess up sync-ing capabilities with the flash and/or the camera (or possibly worse scenarios).
So, my first question is whether or not I should continue using a flash unit which has worked for me, or save up for another one. Second question: if I need to get another one, what is the advantage of buying (read: selling a kidney in order to buy) an SB-600 or SB-800 over other Nikon flashes.
Thanks for taking the time to read all of this drivel, and any help would be much appreciated!
Cheers,
Chris

 

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One more thing...
I searched online for some information about this particular flash, and a store that I found says that this flash is designed specifically for Nikon TTL. However, there is a sticker on the back of the flash that says "Dedicated For Pentax Cameras"
Hope this helps... or maybe I'm just more confused now...
Cheers,
Chris

 

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Scratch that...
They made several versions of the 433D, one for each camera type... this one is for PENTAX; I was reading a page for the NIKON dedicated flash... duh...