I've got over 140 hours on my Z925A MOD. I have loved every minute of using this mower. The 7-iron decks are not flimsy in the least...they are quite strong and can take the abuse of commercial mowing. They leave a great cut and tend to clump less than other decks.
I highly recommend the John Deere 900 series.
'07 Chevy 2500HD
2010 John Deere Z925A 54" MOD
2011 John Deere Quik Trak 647A
John Deere walkbehind