I'm from Australia so I'm not sure on the availabilities but...
Factory 7M-GTE power
232hp@5600 torque
240@4000
Factory 1JZ-GTE power
280hp@6200 torque
269@4600
Here (may be different there) but it is cheaper to bolt in a 1JZ than to rebuild a BHG 7M properly. The swap is as easy as swapping 1 7m For another if you do the research (you guys will need to extend the loom + swap some plug wires) the 1J is more fuel efficient, is quicker in stock form. And doesn't require HG replacement every 5000km. they both respond equally to mods, but the 7M fails at the HG more often than not adding additional rebuild costs.
You guys really seem to like your 7M's