1.6 diesel. Manual or Dsg?

Hello

I'm thinking of trading my Mk6 golf 1.4 tsi for the Octavia estate. (New baby, need more room). My problem is I want to get the 1.6 diesel but I'm worried I will miss the 6 gear gear box my current golf has? I will be doing quite a lot of motorway miles and don't want to be reaching for an non existent 6th gear when pushing on a bit, shall we say! I thought maybe going for a Dsg but that makes me worry about an expensive failure down the line?

Any help would be great. Thanks