Thanks for the replies. I guess it comes down to personal preference. The problem is I am not sure which ones I would like until I demo them in a shop perhaps. I have searched the forums and the general concenus is that:
Senn HD280Pro - lack bass but are well balanced.
Beyer DT770 - very heavy bass and good treble at expense of mid-range.
Beyer DT595 - "better" than DT770, with more balance.
It is a huge choice. I would use the headphones for watching movies (in particular horror film at times when my wife is in the same room as she doesn't like horror), listening to heavy metal music, and playing noisy shooting games on the PS2 (I have a 11 month old son).
I like the idea of the strong bass of the DT770s, but I don't want a muddy and unclear sound.