Planning on buying a new driver for this next season. I really don't want to spend too much but I will if it is really worth it. The fitter at my local store recommended me the 913 D3 with the Diamana Blue Shaft (Regular Flex). I really like it but it is very expensive. I was wondering if I should just save the money and buy a pre-owned 910 D3 with the old Diamana Blue Shaft (Regular Flex). I was just wondering if the difference between the two clubs is big enough to force me to buy the new 913 or if I should just go with the cheaper 910. Any suggestions will help. Thanks!