I'm a lifelong PC user, but am possibly considering buying a Mac for a specific application (running ProTools multitrack audio recording). I just wanted to address a few statements made above.
7 slots are overkill... For some uses, you really do need that many slots. In my case, I don't want to use the onboard video (hogs the bus), can't use the onboard audio (I disable it in the BIOS), I need a modem, may want to use SCSI drives (which will need a host adapter card), and in the case of ProTools HD, I will definitely need at least one processor card and a really big system will have up to 7 (yes *seven*) of these processor cards.
USB ports... I currently use one for my printer, one for my PDA cradle, one for my flash card reader, one for my voice recorder, two for input devices (a jog wheel and a board with faders and encoders), and one for a USB thumbdrive.
PS2 port... my optical wheel mouse is attached to mine - why should I use up a USB port for it?
In the past, I had doubted that I would ever convert completely over to Mac because of all my software investment. I read somewhere that some companies will send you the Mac version of their software if you send them your PC version disks... is that true?
However, I have noted above that someone said you can run Windows on the Mac, which I presume I could do as a dual-boot, right? If that's the case, then I could boot into OS-X for my audio work and boot to Windows for my Windows versions of Photoshop, Visual C++ compiler, etc. So, maybe I'm much closer to switching over to Mac for everything than I was a few years ago.
Is the New Mac Pro Really Cheaper than a Dell?