Might be old but these cars are badass. Granted they are M5's and I myself would probably keep the S62 BUT the 2JZ is such a beast of an engine. Virtually bullet proof stock(can you say 700 rwhp on stock internals?) with a plethora of aftermarket upgrades and support. The first link the owner did his own work with some help and said the swap + upgrades was still cheaper than supercharging his S62!
Then there are the LSX swaps too, which I think can put some some good numbers too.
Oh I see you have a 530 so check out ESS twin screw setups. You are not going to get the crazy 600+ numbers, but given that the I6 cars weigh a couple hundred pounds less than the V8 cars the ESS power numbers are good. Plus the twin screw develops higher boost at lower rpms giving you good low and mid range torque. I http://www.esstuning.com/categories/BMW/E39-5%252dSeries/530i/
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