Are Ah needs the same?

[sleepyluke]

I am about to have to replace a set of batteries as they have hit well above their cycle life (only 3 years though) and looking at making the lithium conversion. Currently I am running 48 volts through Crown CR-190 batteries with the higher Ah ratings. I talked to my local cart guys the other day and they are selling a good many 60Ah set ups and have not had any come back yet unhappy. I am on a mix of hills and number of kids riding. A regular week is typically 5 days a week of 6-15 miles of riding with 2-6 people on the cart. I get I will lose 300 or so pounds with the conversion, but do I need to be looking at the 105 Ah and up type set ups, thus basically doubling the up front cost of FLA batteries? I don't want to skimp and regret it and still have to spend money again.