You plan to clip in on the spinning bike, right? I think any shoe that allows SPD cleats would work. Look at Shimano - they have some Mountain Bike shoes that are pretty reasonable and will accept the SPD cleat. I think a lot of gals on TE also recommend the Sidi Dominator -- but my experience with Sidi is that they are narrow. I have a very narrow foot and my spinning shoes are Sidi Genius.