I have the same problem as you. I run Cubase, Photoshop, Dreamweaver, Maya (Completely kills it) 3DS Max (completely kills again)
You need HUGE amounts of ram to run programs like that. Expecially the graphics ones, failing that you need a render farm really. Just needs so much resources!
the need for ram is growing fast i wont be surprised if 2gb is the new standard. vista takes 512mb just starting up 1gb is too small if you want to run word, photoshop, firefox, etc at the same time.
Id say yes the mac would be okay with it. OSX is alot less demanding with ram in my experience. You should be able to run photoshop perfectly okay as long as you have a decent proccesor as well, what are you getting a G5?
You cant get the G5's anymore? first ive heard.
Yeh Im sure that should be able to run all the programs you listed, seems expensive though in comparison, Im sure you could get much better witha windows alternative for the price. Or are you set on a mac?
I'm not a mac user. to expensive for me and lack of . errr games to play. cof, cof. did I say games? Weird. I should work more.