couples vacation

so my boyfriend and i along with two other couples (we are all friends) want to go away on a couples retreat for the second week of august. we have all agreed that we need a break from the real world. only problem is that it is short notice and we are having trouble deciding where to go. so bloggers what are some great romantic getaway destinations. i was thinking myrtle beach, orlando or somewhere in tennesse...what are some of your options?