Any opinions / feedback regarding the 35hp liquid cooled B&S vangard big block know very little about it. I am very interested in the Ferris IS 4500 with this engine and the 72" deck. I demoed the 5000 with the 31.5hp Cat diesel. It was awsome....... but so was the price tag (about $14.5k). I want to hear pros & cons regarding the B&S 35hp and the IS 45000 Thank you in advance for your feedback.