I"m going to be buying SOME sort of wedge/ramp type pillow next month. Both help with positioning but which type is the best bet? Both are the same basic size, both have removable, washable covers, one is foam while the other is inflatable. I don't want to end up with something bulky that I don't use and can't store but I also don't want to feel like I'm on a camping air mattress. Help!