Gil, I'm interested in the Z4, but it's $525 more expensive (aka 34%) and yes, the spare lamp is nice, but how many of us would automatically buy it otherwise if it wasn't 'free'? Most of us already have screens, too. 92" screen? Don't they make TVs almost that big? 100"+ for me
@ $1100-1200 and I'd seriously have to read some glowing HD70 reviews before choosing it over the Z4, but at $525 differential (aka 1 HD-A1 and 5 HD-DVD movies!) I don't see them going head-to-head - aside from the HD70 stealing Z4 sales because it'll likely beat it on blacks/contrast (if that's your thing) and the whole 34% cheaper part.
Little doubt the Z4 has better colors/sharpness than the HD70 will ever manage.