I think the important amenities are the things you can't get elsewhere. So I say don't worry about treadmills and stationary bicycles, since you can go for a walk or ride a bike outside, where it will also be considerably less boring. (Boring/unpleasant is my big barrier to getting exercise.)

suecochran made a number of very good points. The only one with which I will quibble is BMI. Lean muscle/fat ratio is important to know; BMI is not. (It is an approximant of muscle/fat ratio, but only for people with a particular kind of build.) I think BMI is often worse than useless because it warps your perceptions about your body. I am overweight, I freely admit, but I had my bodyfat measured once, and even if I lost all of the fat in my body, my BMI wouldn't get down into the "normal" range.