After a few failed tries to pay my computer online, I finally change of shops and, happily, it works. In more, I found a better price (which is always a good point) for an equivalent (or maybe even better machine). So, I think there will be a long and exciting period of installation and cleaning in the coming days. But, I am definitely sure it is worth it.
I am just afraid it won't help my unhealthy condition (thanks to the last week-end which has seen an intense night activity and long hours on the beach)... Anyway, you can consider a coming update of the website as granted now!