AMD is currently romping in the charts in most benchmarks.
I have an X2 4400+, and I do a bit of everything. It works great, and I've had no problems. I've even overclocked it a little to the equivalent of an X2 4800+, with almost no change in CPU temperature on air (I do have a big fan and heatsink).
Intel has a vast array of chips to choose from. They all have higher clock speeds than AMD chips, but a slower FSB. Benchmarks show that Intel are slightly ahead in video coding, but at the expensive of heat and performance per watt.
Generally speaking AMD are just as good, and use less energy. Intel are improving in their architecture for the future, however. Check the THG CPU charts on some video benchmarks on chips that are currently out today:
http://www23.tomshardware.com/cpu.html
Check your budget, then see where your priorities lie. Then see how different the best chip from AMD vs best chip from Intel for your budget, calculate some other minor factors you may have, and you'll have an answer!
IMO, an AMD X2 mildly overclocked will perform just as good as an Intel at video, be better at gaming (even if that doesnt influence you), and consume less energy.
In my opinion of course
😀
There are some pro AMD, some pro Intel. Generally, more pro AMD, but check others opinion too
😀