I've had a small Diva for a little over a year now and for the most part it works great. I want to get a backup for it, and figure this is a good chance to try another cup. I'd like to get a Lunette, as that's the one that appeals to me the most. But which size should I get? I'm a little concerned about the lesser capacity of the small one, but the big one might be too big. So, those of you who have switched from small Divas to Lunettes, which size did you go with and how did it work out for you? Thanks.