I think all of the Lazer 3D cases are awesome. That said, I think the HT5 is most certainly my favorite - not because I think it is better than the others but because I don't think there is any other case that really competes with it, other than maybe the Chopin, for APU builds.
Most APU build cases seem to be designed with the idea in mind that they should be tucked away and hidden, but the HT5 just really shines in its design elements as a show case piece that you can set on your media center - arguably where it was designed to go - without sacrificing all the space that some more traditional 'media center' boxes take up, or just looking too reminisce of the late 90's 'home theater' vibe.
The LZ7 is cool most certainly a neat case, but since it's debut I feel like cases that may 'do it better' have released with similar limitations, so the LZ7 has become a style choice more than feeling a niche I think it once did.
The CG7 I think sits in an interesting place, basically designed with a media center in mind (at least from my take) - but able to cram a touch more power, while enviable I'm just not sure it is necessary, so I have to give the slight edge to the HT5.
I'm thrilled to see what else K888D can help bring to fruition, be they his design or the communities.
I was initially impressed with the LZ7, but I really liked the prototype front panel on the demo HT5 that @confusis has reviewed.
Among other plans I have running round my head, I still would like to make a small light gaming rig with a Low Profile 1050Ti in it...
Although the design personally isn't my style aesthetically (still nice though of course!) the LZ7is just so utilitarian, so I would have to choose it! I love the designs of the smaller units, very nice and could fit in an industrial or mid-century modern office really well. Keep up the beautiful work SFF Guru!