I agree with "Bentree" on this lens selection. I suggest you get a copy of the Tamron SP 24-70mm f2.8 VC USM lens, first. It is just as good as the Canon, in that range. but unlike Canon's f2.8 lens it has image stabilization. The glass quality, I feel is better than the Canon "L" quality. The next lens on the list is the Canon EF 70-200mm, f4L IS USM. This lens is one of Canons best lenses. Lately Tamron's len in this range is giving Canon a run for its money. If you need more "reach" just add a 1.6, or 2X converter to the mix. I use both of these lenses on both my 6D, and new 7D Mark II. I shoot as a semi pro, and neither of these lens have disappointed me. You may want to look at the lenses for sale on "KEH.Com". That company deals with used lenses, and offer a warranty with your purchase. Tamron offers a full 6 year warranty on their lenses, to the original purchaser.

B

I just looked up the OP earlier posts and note he shoot a 5D. If this is the case, lenses of the EF-S line will not mount on his full frame camera. If the original poster would disclose his actual equipment he would get better responses. From what I've seen so far, he has not posted his actual interest in what subject he wishes to shoot. I've seen mention from macro, ultra wide, mid-range telephoto, and all purpose lens. Maybe the OP could check the search feature of the Forum before asking for opinions on every EF lens in existence.

B