Inflating your tires properly will avoid getting flats. If you over inflate your tires you will get more punctures, if you under inflate them you risk getting pinched flats. I don't think any one tube is going to give you more protection over getting flats then another one. Once the tube is exposed to something its already too late. Recently I have being using Michelin Pro3 Race and I really like them. Here's a chart on Michelin's web site on proper inflation versus weight:

http://www.michelinbicycletire.com/m...rpressure.view

When I started out road biking, I would pump my tires to 120psi. But now a days I pump them up to about 105 psi. Properly inflating your tires will not only give you better puncture protection but also better handling and a smoother ride.