VED - additional £400

Hello Everyone, I'm considering changing my ageing (2[14) Superb estate for a newish Octavia (also estate). I've settled on an Octavia as I'm not prepared to pay £590 VED for a Superb for 5 years ! and we don't quite need the amount of space we used to.

Question is do I go for an 1.4 IV 2/3 years old or one of the newer 1.5s. I can see merits in both but I'd really appreciate any thoughts (probably an SE-L)

We do a real mixture of shortish journeys and then quite a lot of 500 mile round trips up to Scotland visiting family - about  16,000 a year. 

Many thanks.