I was going to say one of these
http://www.camping-intl.com/details/Isabella_Livingstone_Tent/ we go camping with the kids and friends with their kids. 2 families have got this tent it's a cracking tent, then I saw you need to sleep 5! DOH
Our family tent is from the Blacks constellation range (about 5 years old now) but looking on their site they no longer sell that range.
The vango one you listed looks good. Vango are a good brand and I would happily buy their kit although I've not used their tents. That lip on the groundsheet that goes all the way round is good, our friend's tent has them, it keeps the insides bone dry.
Have a look on Ebay, might be some 2nd hand ones around your way, might get more bang for your buck.