IThe questions I have relate to my G4 450 Dual tower. I really love this machine. Over some time I've upgraded the memory to 1.5GB with PC-133 cards, the hard drive to Western Digital 80GB 7200 rpm, and the Graphics card to Radeon 9000 pro. I've also a DVD burner and one slot of USB 2.0 ports. Fairly thrifty upgrades to this point. But if decide to take the plunge and upgrade the CPU, I'm interested in learning all my options. The Dual 1.8 Maxpower is getting mighty close to 300 bucks. Boy, that sure is tempting. But, my first question is, would the Dual 1.8 be worth it compared to a cheaper CPU for a machine with a 100 mhz bus speed? Or how about, would I notice a distinct difference if said processor(s) were installed on the Digital Audio logic board? Is it possible to just stick the Digital Audio logic board in the Gigabit Ethernet? If not, no worries. I can trade in the GE for a DA on eBay for no cost. Would I notice the difference with the extra 33 mhz on my other components? On a side note, I'm not interested in being scolding by anyone for doing an uneconomical upgrade, so don't waste our time by telling me I'd be better off buying a "blah, blah, blah." There is enough of that in the forum archives for eternity. Thanks so much.