Ohlins Internals for the fork, a Penske Triple clicker shock.
Just Kidding.
OK, for the spools, get Woodcraft. Same thing for the frame sliders. It's a subject that has been beat to death, they're the best on the market.
520 conversion, the stock chain is a 525 (might even be a 530), which refers to size, 520 is smaller, with less weight, thus less parasitic loss in power transfer, so better acceleration. If you go with aluminum sprockets it also hass slightly less unsprung weight, which helps with handling, although very minimally if you're just changing the sprockets. Really, it provides no cosmetic difference, unless you go with a nice gold chain. The conversion includes sprockets, front and rear, so you can change your gearing at the same time. In my opinion, the conversion isn't necessary and would be a waste of money (do you really need faster acceleration?), if you want, a gold chain would look pimp but you can just get a stock sized one and save yourself some money.
Pazzo's, definitely black on black.
A PC3 would be a good choice because with the right tune it would make the power curve much smoother and improve throttle response.