A 159cm (plus or minus one) board will be great for you. I believe it will be long enough to enjoy some serious freeriding, yet short enough to allow freedom of movement in a park&pipe area. Gosh, there are so many good snowboards in the $200 to $300 range. Here are a few good ones:
* Flow The Team 160cm, Freestyle (Sale at
The_House $299.95)
* Forum Roost 158cm, All Around (Sale at
The_House $289.95)
* Salomon Ace 160cm, All Around (Sale at
The_House $298.95)
* Academy Merit 159cm, Freestyle/Freeride (Sale at
Dog_Funk $278.97)
* K2 Instinct, All Around (Sale at SummitOnline $199)
* In case you hit the lottery soon, check out the Burton: White Collection 159cm, Freestyle (Sale at
Alt_Rec $499.95)
Here are some good binding suggestions for the $100 range:
* Burton Freestyle Binding (Sale at
Alt_Rec $79.95)
* 5150 1500 Binding (Sale at
The_House $69.95)
* Forum Destroyer Binding (Sale at
The_House $99.95)
* Ride LX Snowboard Binding (Sale at
Dog_Funk $119.95)
(Be sure to get larger sizes that will be right for 10.5 to 11 boot. LG or XL.)