Advise needed from any ARM Cortex-M programmers out there

Hi all

I've decided to make the step up from using PIC to ARM Cortex-M but having trouble finding an equivalent to the PICKIT to program it.

After googling the net I have been given loads of options but have no idea what to buy.

Can anyone out there give me any advise on what to buy?

I'm so used to buying a PIC16F microcontroller, using MPLAB and the PICKIT 3 I'm unsure about what I need.