Wrong approach. The question is what is your long term goal for tire size and type of wheeling? What about the 44/9 interests you? What about the 30 don't you like? The joint size of your 30 and a 44 are the same. If you are not going above a 35" tire, going to a 60 is not worth the time, money and you will have a heavy low dragger. How much money do you want to drop into it?
Monkeyevil posted this a long time ago about cost comparisons.
Personally, if you decide to go with a 60, I would still build the 9". The 9" has about as much versatility as you can want, I've been very happy with my setup.