First of all I'm a home owner with a 4.5 acre yard. I am down to two new leftover 2012 Ferris mowers with 61" iCD decks. IS2000 has the Briggs Cyclonic 30 hp. for $8131 including sales tax. The other is the IS3100 with the 30hp Briggs Van Guard Big Block for $10700 including sales tax. Yes I have read past discussions on the same issue but I thought I might get some newer info. My gut feeling is the IS3100 is over kill and will cost $2569 more but then I think about resale value. My head is spinning, what do you guys think?