You make it sound as if there are systems without the bottlenecks that you describe. Before flaming Intel (or any other brand), maybe look up some benchmarks ? For example, try some Conroe benchmarks (and don't let them mislead you again by their 1066 MHz fsb).
The only reason why I brought up the word bottleneck is that you should make your system more balanced. What you are doing is making it even more unbalanced than it already is/was.