Tam

I am looking to expand my lens for some low light capability.

I already have the Canon 15-85, which is a great lens, but not meant for low light and indoor shooting.

I read that Canon 17-55 is fabulous but I don't want to spend that much considering this will not be my walk around lens but more of a supplement I am looking at the Tamron 17-50 f2.8 which has very good reviews and is ~$400.

There are 2 versions
TAMRON 17-50mm XR f/2.8 Di II
and
Tamron 17-50mm f/2.8 XR Di-II VC LD

The VC is about $100 more but I heard that its not as good as the non VC.

I do not typically shoot with a tripod and this is going to be used mainly for indoors and low light.

Is this a good lens? is the Sigma 17-50 worth the extra $200?

Should I go for the VC option? do you think it will make a difference?