To everyone that says buy commercial there are only two companies putting out 26" not 30 inch machines. I bought just 1 Timemaster and I did not abuse it but I too have not sharpened the blades since I bought it new in June. I keep looking expecting to have knicks and there aren't any. Very hard blades. I too have had a great experience way better than expected.
Mine has a little over 100 hrs as I don't like walk behinds and use my ZTRs everywhere I can. I mulched all but 2 weeks this summer and it saved me a ton of time. No way will I carry anything else smaller than 30 inches. If they make a commercial version I'll never need one for no more than I use walk behinds. This one will last several more years easy.
2013 Exmark Pioneer S 60" Ultracut (Review with pics) http://www.lawnsite.com/showthread.php?t=410996
2010 Badboy Outlaw 6100 31 KAWI
2008 Exmark Lazer Z AS 60" U/C 28 Kawi
2000 Exmark Lazer Z 60" L/C Kawi 4100 + hrs strong