Should i upgrade to 40m from 16m for £10 extra a month

[chaparral]

I can't make my mind up if I want to pay an extra £10 for a 40m line instead of my 16m line...
I guess it would come in handy as I and my family have many items connected to my boardband internet connection..

prices are
£25 per month for 16m (what am on now)
£35 per month for 40m

Plus a line rental charge