JZ for me too.
I've had 2 skylines (32 & 34, 3 skyline engines - stock rb26, nur rb26 and Top Secret RB28) and 2 Supras (600bhp Modded HKS TO4R Auto- with stock JZ and Stock UK TT 6 Speed) and have to say as an engine and an overall package the Supra wins for me everytime!!
It's a great deal more reliable, my HKS car had 80,000 miles when I sold and still going very strong, had been running 1.4-1.5bar on a T04R for ages without any problems at all. Much cheaper to modify, and the engine is much better specced from the factory, don't have to start uprating sump/oil pump/water pump etc etc.
Dare I say it, its far more challenging and enjoyable to drive imho too.
And I just missed out on a stunning T51R supra from Japan last week dammit
Nito