Personally I love the slick white feel of a Mac Book, and I have also recently got an iMac with an extra two gigs of Ram for ultra speedy home editing.
The other great benefit of a Mac is that it comes with Garage Band which for me is a big player in the recording software market. (More on this later)
Home Recording Studio Design - The Microphone
The nicest cheap Microphone I have found so far is a Studio Projects B1, this is a great little condenser Microphone that is very versatile and can take a good beating. (Which is good for me because I get very passionate and angry during recordings and wimpy little Mics don't stand a chance!!!) I once spent $5000 on a really nice Neumann Microphone only to drop the thing plum on the floor and break it in the first day of use.
This is basically what you need to make your guitar or voice show up inside a computer and make those wavy lines on the screen. I like the Mbox as it has a couple of inputs and is nice and compact.
Home Recording Studio Design - Midi controller
When I want to add some string or maybe a sexy bass guitar I fire up my M Audio keyboard and use a program called Reason which gives me access to over a thousand really nice quality samples; a must if you have an ambitious sound in mind and do not have access to an army of session musicians.