It does just fine for small enterprise. I can only speak for that, however.

This is how I deal with the PC wires hassle:
http://i.dell.com/resize.aspx/xpsnb_..._500_2/131/100

I'm not averse to Apples, in fact I wish more development and software was written for Apples in the digital audio editing and automation realm. My old Commodore 64 has better built in sound ability than PC's up to 1995 or so. When a decent sound card costed more than a couple of C64's.

At work, we have one Apple notebook for graphics design, but we use big hunks of Dell for audio and automation.

At my University we have our share of Mac fans. Well one of them got on a board with some power and convinced my department (Scientific Computing) to buy Mac hardware for a new file system meant to replace our home directories. This server went live and crashed on almost a daily basis, support from Mac was impossible, and we had to replace the entire file system a year later. Since then our support team has refused to purchase another Mac and the guy who pushed for the Mac has said it was a horrible decision and he was sorry for it.

Mac's are not good on an enterprise level. They work great for consumer level PC's but do not function well as servers. At this point if you want a reliable server that will service many people you should go with Linux.

Not that I am a microsoft fan (trust me, I'm not....in fact I've been refused jobs because I tend to lean towards BSD for some services) but I don't see linux being able to do as much in terms of permissions, sharing etc as AD does. Samba configuration is a pain in the ass and having to manually handle all user permissions is even worse.