System to install FreeBSD

[BINDU PULIYANKODAN KAROTH]

Hi,

I am planning to buy a system to install FreeBSD for training on UNIX
Administration. My broad choices are to go for either a laptop or a desktop.

Laptop
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>From looking around the web , I found that Laptops are generally windows
compatible and may run in to issues with other OS.
Can you suggest me some good laptops that would be good for this purpose.

Desktop
-------
 If I choose to go for a desktop ( I do not have any specific
hardware in mind) is it okay if go with any of them available in the market?

Also , in general
1) Are there any specific system requirements in terms of the memory and
hard drive
or other requirements
2) Is it necessary to purchase a system with any UNIX OS in it , to ensure
that it will work fine with BSD.

Kindly advise

Thanks
Bindu