Generally, Intel processors are a better route. AMD has some good products but you will have to research your hardware very carefully (soundcard, videocard etc). Many people run AMD processor based DAW's with no problems. Research is the key. Software is not as critical, but I have run into some extremely strange problems with particuliar softwares on certain AMD processors. Most manufacturers of both hardware and software, gear their products towards and Intel environment. VIA, AMD, ALI, or whoever happens to be making the chipset of the day then follow suit.
Unfortunately, the problems are usually addressed bit by bit, patch by patch, case by case. By the time all the bugs are worked out, you've already upgraded to something else. It's unfair to the consumer, but this has been the scenario for years. I don't want to come off as "pro-intel", but with something as particuliar and specialized as a DAW, or a machine designed for video (DVW?) it's best to stay on the safe side. That's my theory anyway.