From what I've just read XFX Pro 750W all capacitors Japanase and and has better noise and ripple levels and is also produced by Seasonic. It's less efficient but still above 80%. Thermaltake has Capxon capacitors somewhere. Here are the articles. http://www.hardwaresecrets.com/article/XFX-PRO-750-W-Power-Supply-Review/1182/1
http://www.hardwaresecrets.com/article/Thermaltake-Toughpower-XT-775-W-Power-Supply-Review/926/1