ZipZoomFly has these for about the same price. Just wondering which would make the "bigger" difference, 200 MHz or 512KB of L2 cache.
X2 4600+, $260- http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=80727-R
X2 4400+, $255- http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=80726-R
X2 4600+, $260- http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=80727-R
X2 4400+, $255- http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=80726-R