Natural Born Thrillaz has one of the best riding sequences of all time: the Vandall's section. But in terms the most material for your money I would say the Shaft/Shafted combo. It also has some sick riding, and the comentary from Parks, Shaun and Gerry is hilarious.
I agree with mark, the nbt video has one of the best sections ever in a video in the part with randall harris. Evertime i watch just his part all i want to do is go ride. Look for his part at the end of his section with his back foot out of the bindings i dont see how he can still do all of those tricks. Also the rest of thwe video is good.
I would recommend My Side. It doesn't have much sliding at all and has a good variety of riders. It also contains another video The Concussion Project as a bonus which is also a Great vid. So your getting 2 videos for the price of one.
OUtkastz by bigblock productions. Sick video with great riders and vandall has 2 sick sections. Depicts the party lifestyle of wakeboarding like no other video. The crash section is sweet also.
natural born thrillaz, like they said Vandall's section is sweet, lots of cool extras and stuff too, there is a decent amount of sliders in it though, but definitely worth watching