Nice video. I recommend you get some other types of puzzles rather then just face turning cubes. Try and find a Pyraminx and Megaminx, then maybe a Skewb, Square-1 or Square-2. Then you could expand in getting some shape variants of the 3x3x3, and maybe a Gigaminx or Teraminx. Maybe some puzzles from Shapeways.com if you have the money. TomZ's puzzles are very good.

nice collection! I enjoyed watching it! I find it funny that the only 4x4x4 you have tried is the Maru. That one I havent tried myself, but aparently it's a knock off of the Vcube mehcanism, so I will not get it. I am thinking about getting the new Witeden product because it looks really good!

You should deffinatly get a Pyraminx puzzle from Meffert's along with a Pyraminx and a Skewb. Those three puzzles should give you a nice challenge especially the skewb! Also recommended is the Pyraminx Crystal (Brillic) where the Megaminx is sort of an extended 3x3x3 challenge, this one brings something new to it!