The 2JZs cost Porsche money new. Here in New Zealand Japanese imports could be had for a massive discount but they were never an affordable car.
The other engine that comes to mind is the LS1, which was also developed in the 90s and is still used by GM today.
Outside of those two I'd start looking at supercars (I don't mean Porsche, I mean Koenigsegg) for engines that are as impressive.