That picture is a great find. I'm interested to know how many NSE examples ran as 2 car units. There are plenty of photos of Connex units. Shows how popular these units came towards the end of their use on the southern lines.
I am resisting the NSE one at the moment. I have the Connex one. They are nice visually though in reality are on a par with the much cheaper EPB. However, for me, what makes these units stand out is the sound option. They really make the unit come to life. Anyone thinking about getting a Thumper should seriously think about the sound version.