The 770 and 755 replacements are probably a good deal closer than the 790 (which is the 300Wx7 beast) - the 790 got sent back to the drawing board because of heat management problems with the original design, and the impression I got from earlier in the summer was that the 790 was being basically re-designed from the ground up. The replacements for the 770 and 755 should need less design effort, which coincides with the 6 to 8 week timeframe suggested back in August.