alright, so if your looking to bomb hills, and not do any sliding, your going to want a softer wheel
Im riding a 80a (pretty soft) and It grips the road like no other, (abec 11 grippings 70mm). GREAT set of wheels. the scale goes 70a (softest) to 100a (rock hard)
Looking at bearings - dont be tricked, there is virtually no difference between abec 3 and abec 7, and all in between, even though there marketed that way. You would never be able to feel the difference unless your bombing hills at 400mph. I rock black panther abec 5's and they ride well. Make sure to keep your bearings clean if you want to keep the smooth ride you get your first time out on a new set of bearings.
Trucks - I dont know a ton about different trucks, but for a good all around truck I reccomend the randal 180.
Board - Most of board choice is up to the rider, its all preference. I ride a gravity 32" buttons pro. Its a great board, I can carve like no other, but at high speeds its not the most stable (this is also contributed to by the trucks). Sector nine makes some sweet bamboo pintails, arbor makes some legit pintails aswell I have heard. You might also want to look into loaded boards ( http://www.loadedboards.com
) There sweet, and you can customize each board with the flex you want (hard, soft, and all in between) although they reccomend you match flex with your weight. Also look into landhatz (sp?) boards.