Radial master cylinder and braided lines more probably make bigest differance without changing calipers. Changed to a radial master on the 996 as first upgrade. Well worth it.
P34's from 998 and early 749 999 and aprillias mille. Great calipers but 65mm bolt spacing.
http://cgi.ebay.co.uk/DUCATI-749-999...QQcmdZViewItem