PC or MAC

Could I beg a few minutes of your time..?

What is the commonest system in use by professional photographers PC or Mac and why do you think your system is the best suited..?

I am on PC and an Ezio cg24w but am fed up of crashes, and raid crashes.

I am looking to renew my system so I thought I would see what works best for you.

I would also like to know how you store your images, I currently use raid 0 (mirror) on 1 tb drives, I also keep 2 separate 1 tb drives with copies, I like to keep 4 copies of everything.

Any advice would be appreciated, thanking you for your time in advance.

Guy

ps. forget the cost implications, I want to get a system that will function as it should.