Well, I made the switch. I bought myself some Campagnolo Record 9 spd carbon levers and Zonda wheels. I also got a Chorus rear derailleur and crankset. Now I need a cassette.
Does anyone wish to chime in with their recommendation on which cassette I should buy. Based on the terrain I ride I've been using a Shimano 12-23 but I always felt I needed a 12-25 because the hills are getting a little ruff for someone my age. I do some road races but according to my License I'm still a beginner. Thanks alot.

but I'm larger and I run mostly 13-26 9 speed.It's rare I really need a 12 but the 26 comes in handy on some climbs. Otherwise you can get a Miche Cassette in 12-25 or 12-24 for Campy 9