Which Bluetooth dongle for a Mac?

[Chemical Max]

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Which Bluetooth dongle works best with a Mac? Are they all the same?
Is their any legacy, i.e. are certain types old tech now?
I have Bluetooth phone and am about to buy a Bluetooth pda (Palm OS). I have a G4 , G4 laptop and use PCs (Win2000) at work.
In anticipation, thanks.
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Max

[fraeone]

As far as add-on dongles, Apple only supports one, which is of course the one you should buy. It's the D-Link model that they sell on store.apple.com