being an installer, if your modding it yourself I'd recommend the wasabi... you only have to install 3 wires to the actual chip legs and another 6 to other points, its very straight forward chip...

the main differences between all the d2c chips is most of them require a programmer to update the firmware on it... and as of right now the d2ckey you cannot (their is talk about soldering on a connector to be like the d2cpro)
the d2ckey is the cheapest out of all of them and their is no big problems with it, but it is the hardest of them all to install, taking over 30 wires...

so over all I would recommend the wasabi right now because it is currently the only dvd upgradeable chip right now.
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