Yes, orbs are horrible. The actual orb idea is ok, but the heatsink is too car away from the CPU to do much good. Heat doesn't go through air as easily as you might think.
The ThermoEngine is (very) arguably a good heatsink. That's what I've got on my Bird, and it's worked ok so far (about an hour of minimal processing, just built my computer, not even an OS on it yet). But I have the Delta fan on it, so that makes a big difference over it's stock fan.
Apple? Macintosh? What are these strange words you speak?