I'm getting ready to by my wife a Fatboy Lo. I know that I want to add V&H Big Shot exhaust, Stage 1 Air Cleaner, and I will need to download the map or get a fuel controller. My question is, should I add this when I purchase the bike or buy the parts and install myself? While I do my own maintenance on my Road King, I've never done anything this extensive. I'd appreciate your opinions, pros and cons.