Upgrading Shimano Sora Components

Hi,

I'm looking to upgrade some components on my REI Novara Carema. I have the road bike with a mountain bike like frame. Any advice ? Does any one have older higher grade components to sell?

Thanks

You can't go wrong with the Rival group from SRAM. It's relatively inexpensive if you shop around and very high quality.

Thank you. What is SRAM and what do I look for please ?

http://www.willyoumaketheleap.com/

Here's a link to their website. They're just another component manufacturer like Shimano or Campagnolo. When you go to the site, click "products" and then "SRAM Rival"