Things look great.

Only 2 suggestions…

1. Optimize your header graphic using an online "gif optimizer", so that it loads faster.

2. Since you don't have too many products listed, I recommend you put your products in main categories as well. Meaning for example, add your Aluminum conductor head and Shelby copper head to your "high end" category as well. That way when you click on the "high end" category, you don't get that "no items were found" message.

Looks great!