I just got a new iMac for my home and totally confused how to use it and access the files, please help

Hey everyone! I have recently finished my degree in web page design and development and am interested in buying a iMac. I currently use a PC and don't have much experience in the mac computers. I was wondering how good they are to use in web development? Is it worth buying one for my designing of...

I am planning to purchase a new iMac Core 2 Duo,2,16 GHz, 20" LCD,2GB SDRAM of memory,250 GB serial ATA drive and a superdrive and a video card ATI Radeon x 1600 128 mb VRAM Do you believe that it is a sufficiently powerful machine to play the newest 3D games? Would it be helpful if I purchased...

I was wondering if any iMac G5 owners have had this problem, if it's a hardware/software thing -- when I try to put it to sleep, it won't. When it automatically goes into energy save mode (after sleep when the screen goes black), I can't get the computer back on by clicking the mouse; I have to...