4x4 and 5x5 cubes are fairly standard fayre.
The 30th anniversary wooden cube is fairly unique, and I've never heard of the iron cube. As for a DIY kit, there are plenty to choose from. My cube of choice it a DiYan Guhong II, but as they are made by a competitor, please do not ask me for a link. Google is your friend here.
Please take off topic discussion off this forum. Thanks.