maxpedition has a nice assortment of bags you can choose from to fit your needs. there bags are, and can be used as "Tactical" backpacks. but understand that tactical is more about use then aesthetics. so i would say to stay away from most bags that call themselves "BOB" bags. make your own from what is more useful to you, regardless of looks.
some people like their bag to fit their gear, and others like their gear to fit their bag. i would highly recommend getting your gear in order before making a decision.
what i saying is don't do what everyone else is doing. if you live in a rural area, there is no need for and entirely urban kit, no matter how cool it looks. make something that fits your area, and your lifestyle.
also understand that a bug out bag and a survival kit are two different things. a bob bag should HAVE food and water, a survival kit should have the MEANS TO GET YOU food and water. bob bags are meant to get you from point a to point b, not long term survival. make sure you understand this distinction before continueing in your purchases. i made the same mistake early on and my small pack couldn't accommodate how much gear i had. so i had to buy a new backpack. i wouldn't have had to do that if i read up on these sorts of things prior to getting my gear.