Rubiks Cubes

Yesterday I got the book I ordered from amazon. It's called "Speedsolving the cube" The author is Dan Harris, a professional speedcuber. It is a compilation of many algorithms I still need to memorize to get my cube solve times down. It also has methods for the 4x4 and 5x5 rubiks cube. I need to get my solve times down on those too. I still want to order a V cube 5 , 6 and 7. i want to order the v-cube 5 because I think that the eastsheen 5x5 is too loose and too small. My eastsheen 4x4 doesn't work well either. It feels sticky to move and it locks up too much.