Since you had to learn the new C-based language anyways, you could have learned XC8 and taken advantage of all the features MPLABX offers, which probably blows Arduino away (from what I know about both). Plus, like Richard said, Microchip (and 3rd party suppliers) offer demo boards, development boards, and other cool tools to help. I like PIC because I CAN put it on any PCB board I develop. I'm not tied to integrating an entire module, just the processor. Good luck with your new endeavors, I hope Arduino serves you well.