I am going to be shooting quite a few products for a company. The end use is for the product to be placed into a Flash application that allows the clients to assemble their custom compositions and place the order. I would assume these will be used in print applications as well.

The majority of the shots will be straight on, so the can be easily interchanged in the flash composer program. However, I know we will be doing more creative shots to be used on marketing materials and advertisements in the near future.

I would like some advice on which lenses you might recommend to shoot products like those shown below. They will be purchasing these lenses, since there is such a large amount of photography needed, and I will get to keep them. So, I want the choices to be as versatile as possible (I mostly shoot people outside of this project). The camera will be a 5D.

What I am considering, which one or two should I consider most seriously?

24-70 f/2.8
45mm T/S
90mm T/S
50mm macro

And the type of products being shot:

24-70 f2.8 definetely
100 f2.8 macro lens

The 90mm TS-E is great for this purpose, but you should consider getting some macro tubes and maybe a teleconverter to get the full range of shots you'll need.

Hate to do this, but I do have a 90mm TS-E for sale right now as I'm making the switch over to Nikon. I will miss it greatly - it's being replaced by a Hartblei 80mm TS.

Here's some examples using the 90mm TS-E to accentuate sharp focus on a particular plane (here with just the lens element/mount):