Good points. But the most important feature about the Mac, is it`s speed. Get a Apple G4, and you have the power to run these super power draining software. And believe me, these programs take up a lot of memory and processing power. Protools alone, takes a minimum of 256 MB of RAM. That is just to get it up and running properly. Yes, you can open it up on 128 MB, but you`ll see how many times you crash when you are trying to use the plug - ins and what not. On a PC, I`d recommend that you max the memory out. In most cases, it`s 512K, but newer models go as high as 1G. And some, beyond that. You need to get the fastest processor you can find. Believe me, you think a 1GHZ would be fast enough, but like I said, when you get into some serious plug-ins, processing that info, especially multi-processing, drains your computer, big-time. The G4 processor in the Mac computer, is 29% faster than the fastest PC processor. Now, just imagine what a Mac computer, with dual processors can do. Or, 4 processors? Put that together with a their incredible 2G memory, and you have an incredible music / video machine.
But, like people have said in here, PC is catching up, and in some ways, past the Mac. In software, the PC has way more options. Yes, you can use Protools with the PC now, and yes, most studios use Macs and PCs. So, if you take a PC file over to a studio, and they only have a Mac there, they will have to switch the file so it can be used on the Mac, since the Mac's operating system and the PC`s aren`t compatible. Also, the Mac's version of Protools differs from the PC's version. It`s very slight, but different none the less. ( The Mac's version has the same features as the PC version, and more. )
* Here's an important point. Most audio or video software, needs a hard drive with a minimum of 7200 rpm. 10,000 rpm is preferred. Yes, a lot of the PC programs will let you get away with 5200 rpms,but if you start recording long pieces of audio, ( Like multi-takes of vocals ) you see your computer start to stutter. In other words, when you playback your song, it will actually start stuttering.
But, usually it`s price that gets you in the end. You can get a fairly good PC for $500. But, always ask about the hard drive. 7200 rpms will save your life more than once.
Peace.