My Insurance Will Change Next Year To A Plan With

My insurance will change next year to a plan with a donut hole. If I continue on Spiriva, I will reach that stage in July, then I will have to pay approximate cost of drugs until I reach $4,000. What other long-acting bronchodilator could I ask my dr about. I would much prefer to avoid steroids, since I have lots of trouble with thrush.
Thank you,
Amy Wilson