With that short track length, that will certainly be a "Pitch and Puke" machine for me. My old ASV 4810 caused me to puke numerous times during thicker brush cutting operations due to terrain variations and watching the wall of green falling downward. I really can't believe a company would even try to sell something with such small horsepower to run a mulching attachment. 75 hp is not enough to choke down heavy weeds, from my experiences.
Just my opinion from my past 18 years in this business. I would never consider anything less than 150 hp, although I still keep and like my FTX140.