After a chat with a friend (and former colleague of mine) I decided to trust my telco (A1 Telekom) to upgrade to a higher speed, though I only got 12 Mpbs down on my 16Mbps ADSL line because of the age-old copper lines.
I called them, they checked the line and told me that they could guarantee 92Mbps if I go for the 100Mbps option (VDSL).
So I did. Got a new modem (TG 588v), plugged it in and interestingly already for 14Mbps though I only had 12 with the old modem (same line, still ADSL). Then a couple of days later (as announced) they changed my line on the switch/exchange and now I'm running almost 100 down (and 20 up).
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With two kids in the house, netflix, two tablets and four smart phones... it was overdue to say the least.
So finally I can work while everyone else is watching Netflix (or the other way round).