well the two brands or board i highly reccomend you take a a look at are loaded and landyachtz. i have a loade pintail, and i can't say enough how great of a board it is. prob not what you're looking for since it's mainly for cruising and carving, but the loaded vanguard is prob the best of their boards for what you're looking to do. they also come in like 3 different flexes i think depending on your weight and how much rebounding you want. you can also take a look at some of the landyachtz boards on their site. they have a lot of racing/downhill boards that would probably be great for what you're looking for. some of their boards are expensive, but they are very high quality, and it's really worth the extra cash. i hope i helped you out a little bit, but for A LOT more info check out
www.silverfishlongboarding.com and check out the forums. be sure to search before you post anything though, as most of the questions you probably have are already answered. good luck finding a board, and have a great time riding