Crest Whitestrips - which one ??

[runmumrun]

There was a thread about this a few months back, but for the life of me I cant find it....
I'd like to whiten my teeth, and Crest whitestrips looks to be the way to go, but which? There are seven diff choices Here and I have NO idea which to select! My teeth can be sensitive but have been using sensodyne & a fluoride mouthwash for a while now - has helped considerably.
Teeth are moderately yellow, age plus coffee/tea/wine, dont smoke. Do I go for the Supreme at 14% peroxide? The Vivid? And why IS there so much choice??
Help!

From your link I would choose the gentle routine if you have sensitive teeth. I have used these for years and just buy whichever is on offer (am in the US) I have had excellent results from all the different kinds I have used, I always took breaks between use though, (due to laziness and forgetfulness) but you may find that helpful if your teeth are sensitive, the end result was still always great!