Re: No Choice but Windows 8?
As suggested either shop in the small business section or buy a non-Dell machine.
Alternatively if you insist on Dell you could:
A. Order it with Windows 8 and then contact Microsoft to exercise your downgrade rates within your Windows licence.
B. Call Dell and ask for exactly what you want. I know people who have had success with this in the past.
Personally I'd recommend buying something other than Dell. Their build quality has gone downhill a bit in the last couple of years.
Toshiba or Asus would be my suggestions.