My 2 cents, buy a G5 Quad, great system works really well wiht FCP Studio and comparing to the expandabilities of AXP, you are going to be happier with FCP, plus you can also run AXP, and at least you can work on both softwares, and get bussiness from both as well. Macintel… is not as easy as people think, come this june, it does not mean every software will be running mactels, the transition will be longer…why be a beta tester…Quad are meant for huge cpu instensive programs like FCP, again, they work well together.
Keep finding out on threads like these, and get a good feel from people who work on both platforms.
Good luck,
R