Best Used Bang for Buck if I Finally SWITCH ?

I have recently started to use iTunes in a windows environment. Despite some problems, I would ultimately like to back up and/or collect music in an uncompressed format although this project is off to a slow start.

For many years I have used windows just to more easily integrate with the office, but now I have just had my SECOND Sony VAIO laptop die in < 12 months, which is particularly tedious at home where I am unable to check emails, surf audigon and other critically important things over the weekends and at night while I wait to have it shipped off and repaired.

With hopes of a more stable operating system, I am thinking of switching to a Mac, thinking that my music and photos etc should also live on the home machine and I can transfer documents if really necessary on a portable USB chip.

Could any of you please advise me if you have successfully switched over to Apple?

Have you had greater reliability with both hardward and software?

For a good all around at home PC for general purposes and primarily internet access, which used Apple would you suggest to get started?

I am not doing any CAD, heavy number crunching, video editing etc, but like any self respecting agoner, would like the highest performance with the most extraordinary discount from original retail price.