Macs are much more reliable than the vast majority of PC systems out there. They tend to break down less and Apple has a great reputation for putting out quality machines. If you are worried about breakdowns, then there's always Applecare. However, they really are very reliable and rarely break. Plus, you won't have to deal with the virii and spyware that will probably infest your PC 15 minutes after you connect to the net unpatched. As for software availability, I hope someone is not advocating the theft of intellectual property
That would be a bad thing. Relax, there's more than enough software to get your work done.
Here are the specs for a possible system:
Dual 2GHz PowerPC G5
1GB DDR400 SDRAM (PC3200) - 2x512
160GB Serial ATA - 7200rpm
ATI Radeon 9600 XT w/128MB DDR SDRAM
Apple Cinema Display (20" flat panel) (really, really nice monitor)
8x SuperDrive (DVD-R/CD-RW)
Apple Keyboard & Apple Mouse - U.S. English
Mac OS X - U.S. English
Subtotal $3,969.00