Don't forget you could sell all 3 of your lenses and get the 16-55 and have all 3 focal lengths you want have weather sealing and never need to change lenses. I have the 23, and 56 as well but have only reached for the 56mm for portraits. Yes you are carrying the camera with a large lens but the combo still fits in a small camera bag and your covered. I find the image quality on the 16-55 to easily rival my primes. Just wanted to throw my 2 cents out their. Good luck finding what's right for you.
