According to benchmarks Ive seen a vraptor is almost as fast as a raid 0 with the orginal raptors. If this is true youll see a cut in boot times, and loading times. Best advice for your situation is only put ur OS, and games on the drive. Also you do video editing this maybe a good choice as well and then transfer the file onto your other hd. The vraptor looks really nice, but my old raid 0 is like a rock.. When I orginally got my first 10k drive i did notice a difference and it was nice, but the raid 0 did put the icing on the cake.. So if those drives are benched correctly and are almost as fast as a the old drives in a raid 0 you should be plenty happy with the drive.
If all else fails load your os and everything else on run it and see if your happy with the way it loads. If not send it back... It cant hurt and the worse is you say ok wasnt worth it, and you get 250 back out of 300, but its only for restocking and shipping to send it back. And then you say oh well it was an experimient and it nots for me.. Now you'll know and you wont have to wonder, install the drive and I think you'll be hooked after the first boot...
Phenom 9850 x4, Asus MVP Deluxe , 8gigs OCZ ddr2 1066, Visiontek 3870x2, Xfi Elite,2x WD Raptors 10k in raid 0,Antec 1000watt, and Cooler-master Stacker 830 Evolution.