The superstore here usually has albums on sale monthly as the "deal of the day". That might be a good time to stock up.
I love 3-ring albums and started using them a few years ago, but am leaving my post-bounds as-is. It's too expensive to not use the ones I already own. As for switching them, I've always used top-load page protectors, so it usually doesn't take me long to switch pages to the albums that they belong to.