I have a Titanium 667 DVI and lately have been using a number of soft synth applications on it. These things are pretty CPU intensive. I've maxed out my ram, minimized extraneous systems operations and have (barely) reached the threshold of being able to make some interesting sounds. But I'm tempted to spend the $450 to send it off to Day Star to get the cpu bumped up to 1.25 g. I guess I'm looking for opinions on the move. Will my powerbook hang in there long enough to make it worth the investment? Is this a relatively safe upgrade? etc. Thanks.