Yes, you are correct. Place a ruler 12 inches from the focal plane (indicated by the circle with line through it on the pentaprism bulge), focus as close as the camera will go manually, and you will see 35mm of marking through the viewfinder. I'd post a picture, but it's not exactly inspiring photography
As for what lens you should use, is it possible to rent or borrow them and try it out yourself? It is not easy giving advice when we have no idea of your setup or your desired result.
Thanks for your kind reply.

May I ask where can I actually try out the 70-200 L F2.8 IS II and the 100L? If I rent them for a day, its really not worth it since I will only try them out for less than an hour. I know those camera shops won't let u try any lens you like. BTW, canon showroom doesnt have these two lenses.