I think you really need to look at what's available, as it depends on the size of your lenses etc.Telephoto lenses can take up a lot of room. The slingshot 300AW is a good bag and very easy to use,I've got one but you may find it a bit small with 2 bodies and 3 lenses, but again have a look at one to see if it suits.
Best suggestion; make a short list of the makes you like and have a look on the manufacturers web site. Most show images of their bags with camera and lenses in. That way you can find those that best fit you kit.
Better to buy to big than to small