I think you will find it will work just fine for you. I'm still working out how wide to go for my L45. 72" would "cover" the wheels and clear a path wide enough for the machine. My machine has similar lifting capacity to yours, so no worries about having the power to handle it.
Post some pics in use and some reviews once you really start playing with it.
ac
Go with a 72" I doubt you will regret it.