Hello. Thank you very much for your answer. I just bought the 700W Element Bronze II (code HPG-700BR-H12S).
I saw a video unboxing of the newer HPQ series and as you said I wasn't impressed with the quality. Video here: https://www.youtube.com/watch?v=3T2zete_lpg
HPC is also bronze rated from what I know. Regarding the internals, at the end of my comment I will post 2 links where you can see a very good review of SIRTEC High Power Supply.
As a personal opinion, I own one with SERIAL NR 08xxxx ( this means is build in 2008 ) and it is still running strong. So if you ask me, I would recommend SIRTEC power supplies.