I did a lot of research before I set up my rig and the best bang for the buck is the Apogee, that why I bought it. There are better blocks out there such as the storm but the difference is around 2 degrees, negligible.
All your other stuff is excellent, I would definately go for a bigger rad if you can get it to fit. The Thermochill pa120.3 is the best rad bar none. Mine had a leak so I sent it back, in the mean time I fitted a Swiftech 120, there is no comparison, I have now refitted my Thermochill and there was a huge drop in temps.
Details can be seen here http://forums.overclockers.co.uk/showthread.php?t=17643755
All your other stuff is excellent, I would definately go for a bigger rad if you can get it to fit. The Thermochill pa120.3 is the best rad bar none. Mine had a leak so I sent it back, in the mean time I fitted a Swiftech 120, there is no comparison, I have now refitted my Thermochill and there was a huge drop in temps.
Details can be seen here http://forums.overclockers.co.uk/showthread.php?t=17643755