The first video you see when arriving here is Mats Valk's 30.02 second 4x4x4 world record solve. He achieved this in the first round of the Dutch Nationals which took place on 17th December 2011 in Zaandam Holland.
I will continue updating this page when records are broken or new videos become available. Each video is embedded (not copied) and ownership rights are fully respected.

The Dayan 5 ZhanChi was released in 2011. It is a 5th generation Dayan. It supposedly combines the speed of the GuHong and the non-popping design of the LunHui.   This is the puzzle Feliks Zemdegs used for his 5.66sec world record.

The Dayan GuHong is widely regarded as the best Rubik's Cube available. It came number one in a recent poll and has been used by current world record holder Feliks Zemdegs. The puzzle is incredibly smooth with a large cutting angle. It needs to be tensioned correctly and lubed but once done it is truly remarkable.  

The ShengEn FII is also very good and often rated second to the Dayan Guhong. Some people even prefer it. It's been described as slick, smooth and quiet. Downsides though are the caps can fall off and the stickers aren't very hard wearing.  
 
The Alpha V (Type A) AKA Type A DIY is another recommended cube. It's very fast and cuts corners as well as the Dayan Guhong. This means it's suitable for rougher handling.
 
The Dayan 4 LunHui is the improved version of the LingYun and is supposed to pop much less because of torpedo shaped pieces inside. Lubrication is recommended.

The Dayan 3 LingYun is very similar to the Dayan Guhong and a great puzzle. However the mechanism is a little more rounded and more prone to popping. Once again it needs tension adjustments. The Guhong cuts corners a little better.