If I was you I'd get rid of Mr. VT and marry me......
Seroiusly, this is a huge decision to make and I think if the opportunity has only just started you thinking about it I'd take some time to let the dust settle before committing to anything. I'm part of a fairly large family and I'm the only one left in the UK, the others being in Canada, USA, Brazil and New Zealand. Individually they all seem really happy with their moves and will each try and convince you their choice was best, but they all also acknowledge they miss the variety and opportunity you get in Europe. If it helps any they all also say that the logistics of the actual move is the easy bit!
There is no such thing as the perfect country, they each have their strengths and weaknesses. Stability used to be the big thing in the UK, but given recent events that's slipping and I think the next few years will make me decide where I'm going.