If you don't want to spend loads we got the 2 man lightweight tent from decathlon. £110 (I think) and 1.9kg. It's slightly larger than other 2 man tents. It's not freestanding though so things get tricky if the ground is solid.
I think Rupert has the 2 man alpkit, slightly more money but lighter.
I like the Decathlon tent. Really easy to pitch, goes back in its bag easy enough, seems well designed. Definitely long enough for a tall person, and OK for two if you don't mind keeping some bits outside. There's a little room in the side bit but not a lot.
Cheers, some good info there (although the two man V went for is 4kg).