No detail (entertainment, food, etc) will impact your wedding more importantly, than how present you are with your guests.
In fact, dance floor status at weddings is usually not because of the entertainment. Most times, it's because the guests want to dance with the newlyweds, and will take their cues accordingly.
I love entertaining at weddings, and I do a spectacular job for all of my clients, wedding or otherwise. But live entertainer or not, your wedding day will be special and meaningful, simply because you are marrying the one you love.
So make sure that whatever kind of wedding you are planning is truly what you want, because your guests will be happy enough just being able to celebrate with you.