do you know what kind of longboarding do you want to do?
cruising/carving
downhill
sliding
flatland pumping
etc.
how much are you looking to spend? - can give you suggestions based on your budget
right now i have a LongboardLarry (LBL) otter with Randal R-II 180 trucks and Pink SevenO wheels and love it. i used to also have a loaded pintail which was great.
whatever you do, DO NOT BUY a sector 9! with the exception of thier high end stuff, its all garbage. there are way better boards from way cooler compaines.