I am a newbie with a question, I realize the new Kubota gas ZTR's are new this year but I have a few questions. I have been looking at this mower and the Exmark Lazer 48 and the Cub Cadet 48 tank? They are all close in price but the kubota's blade tip speed is much slower (15800) compared to 18000 plus. The Kubota's deck is shaft driven but I believe the others are not. Is the slower speed due to the shaft drive and will this make cutting taller grass harder? BTW, after reading many of the posts on this forum it seems like Exmark is the most popular, is this due to reliability? Thanks in advance!