It really depends on what kind of coin you feel like dropping.
Note: Are you aware that you can go DUAL AMD now as well with Athlon MP setups?
Regardless, with the 2 options you've listed there..
I'd defineately go with AMD.
I personally couldn't justify paying so much for a Intel 1ghz processor (x2), since its performance isn't anything to rave about.
The AMD setup will be very sufficient, generally faster in most areas (expect SSE/SMP optimized programs.
Since you are into graphics(me too!), RAM will be the most crucial part of the whole upgrade.
Buying the AMD setup will allow you to buy more ram as you will save $$$ by going AMD.
The programs you have listed are very hardware intensive, but mainly RAM pigs. DDR will also give you extra bandwidth that programs like 3ds will just love.
I like being able to run Photoshop/Imageready at the same time.. and its not easy w/ any less than 256mb of ram. Even then it can get a little hairy.
Same goes for 3ds. I can bog down quiet easily as my model progresses.. and my system is no slouch!
Hope you picked AMD 🙂