Something to think about:

how hard is it to get replacements parts for a RB26?
How hard is it to get replacement parts for a 2JZGTE?

Aftermarket support DOMINATES the 2JZ market. Tons of stuff available, RB26 is not so, very little support WHEN COMPARED to the 2JZ IMHO.

pound for pound i would take the toyota proven 900whp stock block workhorse over the rare JDM RB ANYDAY.

whats the fastest RB in the world, whats the fastest supra