cs4 is a fucking huge program.you will need close to 25G of free space to install,2Ghz processor(2.8 for HD),2GB but i would recommend more like 4GB of RAM,a OpenGL 2.0 compatible graphics carddedicated 7200rpm hard drive for DV and HDV editing and so on,and still more.there is a package deal with cs4 that is being offered from newegg.com where you can get the master collection and the right video card(PNY VCQUADRO-CX Quadro CX Accelerator with CUDA-enabled H.264 Video Encoding) together for $4100.the master collection is about $2500 and the video card is about $1800.i will say however that the new photoshop is defiantely an upgrade from what cs3 was,but i don'tthink it's worth the amount of money you have to pay to get it.if you have a cs3 already and have registered it,then you can upgrade your cs3 to cs4 for about $500.i would give it about 6 months and you will see the price drop down to around $250 to $350 for the upgrade pack.

i'm a web designer,.net developer,network professional,so ineed these kinds of "toys" in my line of work,but i will still wait and see how far the price will drop in a short period of time,or one of my customers is REALLY thankful and just buys or offers me it,lol!!