lens question

[cuz]

I'm looking for a lense for my canon T2i, I was told to grab this one..

http://www.londondrugs.com/Cultures/...1&ProductTab=3

But I know I really want to try my luck with some macro pics and was wondering if this might be the better choice?

http://www.londondrugs.com/Cultures/...2&ProductTab=3

Any advise on either lense or even recomend something different possibly?

thanks in advance!!