Nathan124;
You might be better off doing what most of us are. I was headed in the exact same route as you, getting a 1900+ and thinking about overclocking it. I don't think you can go much beyond 1700MHz with the 1900+ (only about a 5% gain) whereas with a 1600+ I am able to run at 150*10.5 (1575MHz, 12% increase) with absolutely no increase in voltage to either the CPU or the DDR. I'm using standard Crucial PC2100 and am cooling only with a ThermoEngine and a Delta 7K RPM fan. The CPU stays steady as a rock at 35C during every operation I throw at it. I'm using Windows XP. I'm sure I could go ever higher if I wanted to bump up the CPU/RAM voltage a bit, but I haven't bothered trying.
The Horta.
PS. This is for my wife's new video editing system using Adobe Premiere 6.0, a Canopus DVStorm board and a bunch of other crap.