Having worked on those I can say without doubt they are fucking piles of shit. I saw way too many of them with dead motherboards within 2 years and they are an absolute fiasco to disassemble.
I had an Alienware X51 before I ascended from peasantry and learned how to build a proper PC, it sounded like a fucking rocket launching into orbit the second it took on any load to the gpu or cpu and was hotter than the 5th layer of hell. I can't imagine this case being much better?