In my humble opinion, I'm amazed how many still shoot with the 24-70. Such a lazy lens, soft, barrel distortion at 35mm and below...if you're a serious wedding photog, this lens hit the closet shelf years ago. Hopefully the new one coming out is a drastic improvement. For me – Group Portraits 35mm, 1-4 person portraits 70-200, bridal portraits 85mm L II, 70-200 & 17-40 for ceremony coverage. If the new 24-70 is as sharp as advertised, I will purchase and use for receptions, as I switch between fast primes and my 70-200 now. One thing I would keep room for in your budget is lighting, it’s as important for weddings as expensive lenses. An Einstein or equivalent for portraits and some 600’s for OTC flash during receptions are a necessity to keep up with modern style wedding photography.