i am looking into buying a new mini exc. I have a kubota with fel now. I live on a hobby farm and usually rent a mini exc 2-3 times per year. I am ready to buy. I mainly will be digging out small stumps, ditches, some firewood work. I have a few small ponds which need some work. I want to spend less if possible but dont want to regret not getting the bigger machine. the kx91 is around 800 lbs more. Is that enough to make a significant difference? I suspect either machine will be fine but was wondering if there was a reason to go for the 91. thanks.