I don't have my Ant's just yet, but I'll be getting them hopefully in batch 5. Just ordered a Corsair RM1000 that should be good to power them both. I chose this one because it's fully modular, has 8 PCI-Express connectors and at the time I was able to get $20 off, plus a $20 rebate card. So it was essentially $140.00 for a $180.00 psu.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139057The RM1000 is a good, solid choice. I have had luck with the Corsair products, having owned a CX600M (sold it to a friend to use with his S1), and an HX1050 which powered 2 S1s for 4 months and is now powering 2 S3s.