Looks like its coming together nicely! I hate to comment on the psu as I fear to get flamed! 8O I think it would work fine with your build and no intentions on overclocking. The dual 12v rail allows for more amperage. High end video cards and systems require alot of 12v amperage, especially dual video card systems. I dont know much about 'active pfc' but the power supply you chose also has it! Here a basic definition I grabbed.
The preferable type of PFC is Active Power Factor Correction (Active PFC) since it provides more efficient power frequency. Because Active PFC uses a circuit to correct power factor, Active PFC is able to generate a theoretical power factor of over 95%. Active Power Factor Correction also markedly diminishes total harmonics, automatically corrects for AC input voltage, and is capable of a full range of input voltage. Since Active PFC is the more complex method of Power Factor Correction, it is more expensive to produce an Active PFC power supply. :roll:
Heres a nice calculator to play around with...it may help to bless your decision!
http://www.extreme.outervision.com/psucalculator.jsp
I dont know if you plan to run vista anytime soon or not. You should think about getting 2G if you are. If not you should atleast get the cas4 ram for an extra $13. Its well worth it!
http://www.newegg.com/Product/Product.asp?Item=N82E16820145040