OK so I compromised with the Wife.

I have my 5870 running at around 275Mhash/s.

With flags set to -v -w128 -s0.01 Note the -s for throttling the card.

My card clock and Mem is 900/900 Fan: 44% Temps: 74%.

That way it's not to hot, nor to loud, everyone's happy.

[edit] Image tags aren't working?