Not for 5k I have 5k to invest and I was thinking of getting 3 x 7970's for mining. And I am looking for a small amount of cash ontop of my income thats all.
I did it and I don't regret it. It's been a good learning experience and at worst you can ebay your rig to recoup most of your investment. Make sure you at least look at the mining calculators and see if the return is worth it for you. Remember to include the cost of electricity and the inevitable difficulty increases.