Hi Heiko,
I have built a HTPC based on the mini client 2500. Its exceptionaly well made and it is running an i5 650 as cool as a cucumber.
I to wanted something that was cool, quiet and would look good in my media centre. It actually looks better in real life than in the photos on the atech site. Its certainly more petite than those photos make it look.
Its expensive! particularly when you get it shipped to Australia.
The delivered package came complete with all the screws and parts clearly labelled and was incredibly comprehensive right down to all the german made tools required to assemble it.
Glenn at Atech was also very helpfull. If you have got the cash I would highly recommend it.
My build is Atech Mini Client 2500, Intel DH57JG mobo, 4G Corsaire ram, OCZ 2 60G SSD, Mini Box pico 150 PSU + 150 watt power brick, then optical out to AVI ADM9.1's
