The Thermaltake Toughpower series is a relly good PSU and the TR2 series is decent. You don't need 44A on each 12V rail; 33A minimum, but a 36-40A combined would be good. If there are multiple 12V rails, then you can't simply add the amps up. You have to take the max 12V continuous watts rating and divide by 12 to get the max continuous amps capacity. 432W on the combined 12V rails or greater would meet the 36A recommendation that I gave above.
No no no...Thermaltake power supplies are if anything worse than Coolermaster. The TR2 is so bad out of spec it can be dangerous. A few of the Toughpower units are decent but they are hit and miss depending on the wattage. Just for that reason I would never recommend one.http://www.hardwaresecrets.com/article/Thermaltake-TR2-RX-750-W-Power-Supply-Review/902/9
The only brands that are good across the board are Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ and Antec. You can easily find a unit from one of these brands in your price range.