I, too, had a C300 Green Messenger, and I loved that ball. Recently got back into ten-pin bowling (was a candlepin guy for a long time) and I had to replace that ball. I didn't try and replace directly; but, I had the luxury of being able to go to a demo day and try several different balls and found some of the new stuff that I really liked, ended up purchasing one ball, then like 6 weeks later another. I'd be interested in knowing what the OP ends up with, and how he thinks it compares.