The N J Large should be a good starting point. The 2.0 is quite larger than the NJ large. I think it is more like 5.1/2 wide rather than 5 3/4, but the bulb is nearly 3 times of the large. If you put the 2.0 over the large you will not see it at all.
If you are not use to big you may have a difficult time getting it inserted. I have both but use the 2.0 the most. After you get bored with the large get the 2.0. A stainless toy is much superior to any other. The added feature of the weight of the 2.0 is also gives more pleasure. I didn't put a review in because there are already so many positive one for the 2.0.
Once you go 2.0 you will not go back !