It likely depends on your career objectives. If you want to go into MC, IB, finance, or any other recruited job, you will definitely have an edge career-wise if you get work experience first. I'm graduating this year and decided to attend now for a few compelling reasons- and I'm going into public policy, government, or nonprofit, so I decided to attend now to save on logistical difficulties later on down the road. I think I would have had better chances if I worked a couple of years but the benefits of going now were pretty huge. I'm on the waitlist for my first choice school so my hope is that they take me later on!
From what I know, schools friendly to college seniors that are close to the rank of the schools you mentioned are WasU (olin), Rochester (Simon), Purdue (Krannert), CMU (Tepper), UIllinois (a bit lower ranked but still a very good program in many regards).
Let me know if you have any questions about this, I would be more than happy to help you out!