I've got the exact one, bought it years ago, but a lot less than that.  I wouldn't bother with the Karcher snow foam, grab some 
Magifoam Snow Foam.
It's quite good and if you put it on MAX setting it covers the car in a thick, slow dripping foam.  However, by all accounts the 
HD lance is better, so I'd grab that if I was buying again; it works out about a tenner more expensive for both than your link, but better results. 
