I'm trying to decide between a Kubota B2920 and the B7800 (only $100 difference). I like the fact that the 7800 is tried and true, but my dealer's quoting me MMMs and FELs at a higher price for the 7800 than the B2920 ($700 more for a 60" MMM; $900 more for the FEL + valve). Given these...