Running a MacPro1,1 with 2x 2.66 GHz Dual-Core Intel Xeon and 4GB of RAM. System seems to really lag behind these days. Frustratingly slow. Is there really that big of a difference in architecture in the new Nehalem-based Xeons to make a single processor, quad core 2.8GHz that much faster? I know clock speeds don't count for a whole lot these days, but wow. As much as I'd love to jump to a 2x Westmere-based system, I don't think that's in the cards. Or, is it worth waiting for Apple to bump the processor specs again? Edit: I should add that this system is used for many tasks, amongst them including editing HD video in Final Cut. Oddly enough, MS Word of all things seems to bring this monster to a crawl. We have huge, several hundred page Word docs with many images spread throughout. Also lots of web development, but heck, that can be done on a Macbook Air with the same degree of speed.