Sector 9 is a good brand, one of the boards I own is made by them (Off the wall 2 model). Trucks really depend on what kind of ride you're looking for. I'm a fan of the sidewinders just because those trucks give me the same feel of being on a surfboard and pumping for a wave, with the ability to rip sharp turns. However they can be a bit dangerous for crazy downhill rides. I recommend their charger trucks for their versatility, though sidewinders have a surfy feel to em (which is popular with surfers for obvious reasons, though hardcore skater types don't like em much. to each his own.).
As far as bearings goes, Bones is tried and true, I swear by em. Bones reds are good bearings without having to break the bank. Not much of a difference at all from the Bones Swiss performance wise, but the swiss are more durable as time goes on. Either are worth the money for sure though.
The sector 9 brand wheels are pretty good out of the box. orangatang makes some of the best longboard wheels i've used, which i recommend if you want to get away from the stock wheels. As far as durometer goes I personally like the mid range for cruising (my orangatang 80a's are perfect for that). They're soft enough to give good grip and a smooth ride, and when you break them in they also can powerslide pretty good.
have fun :)