Good price for 512. However, many including myself, with AMD rigs (esp. Nforce2), have found that Geil memory doesn't perform anywhere near its rated speeds and timings. They have poor corporate customer support also. Since it is from Newegg it would be hard to go wrong. because they have great customer service, just don't expect much support from Geil. This is not intended to be thread crapping. I just wanted to warn others of my experience. I have the PC3500 platinum ultra (currently RMA'd with Geil).
2nd the motion, WAG! I have the NF7-S. I have heard that Geil does well with Intel systems, though.