Expensive putters are a complete waste of money,what you need to do is try out a bunch off putters and stick with the one you feel comfortable with.Ive used the same putter for the last 7 years and guys ive caddied for on tour were shooting crazy low rounds with the same stick they were using in the 70's.Try a bunch out and practise like mad with the one you choose and don't adopt the "scotty approach" where you think the club will do the work for you cos it wont!.