Isn't razor burn the worst? I hate it and have not yet been able to find a way to avoid it in that area. I think the suit is kinda cute to be honest, certainly different but not in a bad way I saw go for it if it'll make you comfortable...that's what's important!
If you want to try and stay with your current suit, have you considered waxing? I know it's supposed to be pretty painful but I think it would eliminate the razor burn.