If you want to stay at 700W, one of these will do the trick and be at least as good as the CM PSU.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007657%2050002177%2050001459%2050085693%20600014091&IsNodeId=1&name=be%20quiet!
I just hope the PSU was the only thing damaged by the lightening.