It's definitely a personal choice, but if there's no medical need, I personally would avoid it. Hope that makes sense... some ladies need them because things aren't going naturally or there's retained tissue, some doctors do it routinely either way.... I was told/advised by a few different doctors if I want to preserve my fertility as much as possible that I should opt for natural or non-surgical methods. So I opted for non-surgical.
Does your doctors office offer medication to help along the process after the definitely confirm miscarriage? That could be another option if you wanted to avoid surgery. It's worth checking into, but the choice is different for each of us for sure.
Sometimes it's nice to have the instant gratification of having it "over & done with" so you can move on, but it's different each time and for each person.

I'm sorry you have a difficult choice to make right now during this devastating time. It's NEVER easy, but hopefully your doctor along with you can help you decided the right plan of action to go along with your concerns & feelings.
BTW,

to TTCAL and I'm sorry for your painful losses!