You need a Wide Snowboard about 157-160CM. Good thing there are several very nice snowboards in this size and right at your budget
K2 Raygun 160W- This is a very good snowboard for for the money, many people just ride this one, even over more expensive boards. Lots of reviews on this site. This is what i would get if i only could have one board on a budget.
Rossignol Templar magtek 159W- anther good all mountain board, good hybrid rocker profile for good pop and pow float.
Capita NAS 160W- Regular camber normal snowboard with some setback, good for going fast. ok pow float.
Bindings- Union force, solid comfy bindings with good performance, also very durable.
Boots- comfort is really up to you, go to a shop and try on every pair you can afford. buy stiffer boots with regular laces as they tend to last longer by not breaking down as fast.
Dude, suckin at somethin' is just the first step to bein' sorta good at somethin'