Nobody knows fur sure, how profitable mining will be in the future. It depends on bitcoin price and the difficulty. At the current price ($50) and with a difficulty of 80-100,000,000 a 60GH/s unit will still pay for itself within 6-9 months. Not too bad compared with other investments. 

Peronally I think that diff wont go over 100,000,000 within the next 12 months but of course, I'm not sure about that.

The first people that ordered ASICs with pay off their units in  a few days (if BFL ships soon this is). Ordering now might still make sense - IF you have trust that BFL will deliver at all.

Use this calculator and decide for yourself: http://www.bitcoinx.com/profit/