um... dang, hate to say it but I'd have to disagree with this one
Here is the reason. Cost wise. Get a high end P4, I'm not sure what it is but lets say a 3.2 Ghz... last time priced about 3 months ago was around $800-$900 for the extreme. Then 2 Xeon at 2.8Ghz run around $650-$700. So, cost its better. Here is the biggie, though. What he is using it for (graphic design, vid editing, autocad maybe??), most of these SUPPORT dual processors thus making the application run MUCH faster. If it didn't support dual procs, then I'd be inclined to agree, but since vid editing and maybe design is involved and much of the advanced edit software can utilize the benefits of dual, then YES, go for dual processors.... NOT a single.