Buying new rigs at this point is so-so at this point unless you get a lot of hashing power (talking 3-5ghash/s or better).
If price climbs with difficulty, you win and have zero risk (since you also get to keep your hardware & can sell it any time).
If it stagnates but diff. goes up to 1.3m - 2.0m, you are essentially mining for free, and in a few months earning 0.0BTC per month at 5m-10m difficulty.
I'm not bagging on miners, hell I mine at way past 10ghash/s. I'm saying it's becoming unprofitable soon, but time will tell if prices keep up.
Should prices stagnate at around $15 but difficulty goes past 5 million then I'm putting my rigs offline until difficulty decreases.
Even if we
are all COMPLETELY wrong I can still sell the video cards 2 months from now and retain at-least 60% of my money back. At current difficulty, and exchange rate, ima be looking at roughly 1200-1600 on the first month. That cards can easily pay for themselves in one month.
BTW SICK MINE RATE
I like the fact that mining adds value to the network, and of course your going to try to steer me away from mining, it only makes your life harder ;p but unselfishness is the key to bitcoins success my friend. I am telling every single person I know, because I will get mine sir. I am not worried about it..