Not bad at all.
The Freezer 7 is perfect for a mild overclock, but then you could get DDR2-800 and save some money. I'm assuming you want more than that, so get a heavy-duty cooler like the Thermalright Ultra-120 Extreme/Scythe SFF21F combo or a Tuniq Tower.
I have WD5000AAKS disks and also WD7500AAKS. The WD7500AAKS is noticeably faster. Also look at the new WD6400AAKS.
Get this PSU instead, it's also called Silencer 750W, same price, but it has 6/8 pin connectors instead of fixed 6-pin.http://www.newegg.com/Product/Product.aspx?Item=N82E16817341011&Tpk=Silencer%2b750W
Just in case the 9800 cards need 8-pin connectors...
This thermal paste is better than the AS5:http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020&Tpk=MX-2