For low light you need a fast lens. f/2.8 or faster.
You mention about close up, I think what you mean is from where you normally position yourself, you are missing the 'reach' to get a close up? Because your kit lens is wide enough to go closer.
Based on what you described, it would seemed 70-200 VR or 70-200 VR2 is more suitable.
I have the 18-200 VR (version 1) and I am telling you in weddings, it does have enough reach but not fast enough. I have to crank up the ISO to above 1600 at times and it makes the photo too grainy for my liking. If I stick to ISO 800, the lighting conditions, the shutter speed can be 1/4 to 1/20 and even with VR, there will be camera shake (at least for me).
For 17-55 f/2.8, ISO 800 is ok but I don't have the reach because I am not AD photographer so I usually shoot from my seat...
I tried the 70-300 VR before and it performs like the 18-200 VR except it has more reach. But more focal length also means you need a faster shutter speed to prevent camera shake.
I am of course assuming you don't use external flash.