Just returned from cpap study

I just returned from my cpap study. The mask I used at the study was the Resmed Ultra Mirage II. It seemed to work o.k. but it was only one night so I don't know how it will feel after time. They let me take it home. My question is when the homecare people call to set up a cpap machine do I have a choice of what they should bring? Is one machine superior to any other? I read on another post I should tell them what masks I want to try. I guess i am wondering what I should ask for the person to bring.

Thanks.