I would change the Antec TP-550/650 for an Antec Earthwatts 650. Other than that those are great suggestions.
The TPN 650;
1] Provides up to 54 amps of 12v power to the EA's 45a.
2] Is more efficient.
3] Has greater upgradeability ( 4 x pcie power connectors ).
4] Is semi modular ( and sleeved ).
5] Is on sale ( at Newegg )
for the same price as the EA650. The 750 Blue is the same price after rebate as well.
Don't get me wrong, I'd have no problem using the EA, but they are 2 different classes of psu and at the same price the TPN is a much better option.