Bluetooth Dongle recommendations?

[Ianxxx]

My bluetooth dongle stoped working from about 10.5.6 onwards, I got it to work by going back to an older bluetooth kext. This isn't possible now as I'm using snow leopard.
Does anyone have a bluetooth dongle that's behaving itself and working properly in either 10.5.8 or Snow.
If so what make/model is it.