Reply To: looking to build my first emulator station

[herbfargus]

If you want an all in one solution with all peripherals then canakit will be your best bet- I bought the same kit and its worked great for getting things up and running quickly. I would definitely go for the Pi 2 over the B+ as the speed is a notable difference in boot times and emulators. Go with HDMI over RCA as RCA has buzzing issues with the sound (at least in my case).

See this page and the linked video for a quick overview of getting started:

https://github.com/retropie/RetroPie-Setup/wiki/First-Installation-(RetroPie-SD-Image-2.6)