I think I say #2. But if I knew someone with that name and was saying it all the time, I feel like it would turn into #1--just because it seems to be a little easier to say (and I'm a little bit southern ).
Apparently in my local accent the difference is *very* subtle. I've said both out loud a few times and barely heard the difference. I also know 2 little Amelias and never realized there were multiple ways to pronounce it.
Either way is pretty and I think that others will follow your lead.
DD's name is Amelia and we pronounce it like #2, but my good friend from Germany says it more like #1, which I like, but I'm so used to the way I say it. And she calls herself Mia, which I think is adorable!
Amanda Mama to Amelia (9.8.06) and Jonah (6.19.09)