I'll try not to be redundant, since I asked a more detailed engine performance inquiry elsewhere (where I may or may not get a reply). Basically I've narrowed my search to Ferris for their suspension. I already don't want to mow my own lawn, so being comfortable doing it is more important to me than the cut quality. I have a 12 acre property, with a couple of acres that I like to have mowed. It's flatish, and bumpy. My schedule is irregular, and we get pretty saturated with rain in the summer months, so there are times when the grass gets high. I've gotten quotes of $7500 for a Ferris ISX800 with a Kawasaki FT730 EFI and standard seat, or just under $8,000 for an ISX800 with a Vanguard 810 (carb) and suspension seat. The suspension seat is appealing, but I can also buy the stopgap kit on Amazon for under $200. As a homeowner, I plan to keep it longer in years rather than higher in hours, so the motor continuing to run 15 years from now is more important to me than the annual fuel costs. With that in mind, who would go EFI Kawi, and who would pay the premium for the Vanguard? Again, I'm asking here from the homeowner perspective, so long term reliability, serviceability, and maintenance costs are more important to me than fuel costs. I'm happy to hear suggestions on other mowers, but they have to be under my $8k hard limit, have excellent ride/shock mitigation, and ZT3200s or better.