[Cabe]

Loading more depends on the speed of your HD and RAM rather than the speed of the processor.

In most cases, and I mean 90% of programs that you buy new today, will run with dual core support. If they don't right out of the box or its an older program you can bet someone has released a patch to do so.

Even if you can't find a patch a dual core processor will come with a dual core optimiser to get the best out of all programs, even ones that don't have dual core support.

Multicore is the way forward, Intel have a Quad core line of processors and you can get a Mac with 8 cores. So its better imo to get a dual core than a soon to be outdated single core.