A bit of objectivity, for a change...
In its current configuration, the A380 can fly 8200nm still air with a full load of pax. By 2010-12, improvements to the frame will allow it to fly 8500nm with the same load.
It can currently do Lax-hkg wintertime with about 60T payload (out of a max payload of about 85T), or 20-25 more than the 744, meaning it can take full pax load (500) +10T cargo compared to full pax load +almost zilch cargo for the 744. That's also 10T more than the 748, or 50 pax + 5T cargo. And that's before the planned improvements.
Despite what the Boeing lover's cult (and their fleet office guru) say, the 748i will only fly farther than the A380 if carrying less than 40T payload. (In which case you're better off with a 777). The savings from the lower operational weight do not cover the revenue loss from the extra payload of the Airbus, and since by that time CX will be able to fill those to most major long haul destinations, it makes a lot of sense. Especially if they can get them cheap...
Although the 748 freighter does wipe the floor with the competition, no question there.