I agree with rstevenson...
Unfortunately, you have to think about how CUSTOMERS are likely to view your site, rather than by what turns you on.
MANY computer users still use older monitors (not many wide-screens around), so you have to consider that many (potential) customers will be accessing your site on older equipment.
Don't ever allow horizontal scrolling to occur. It's a real no-no for e-commerce and a sure-fire way to chase visitors away.
At the end of the day, people are at your site because they have a good idea of what they are after, so you need to make sure that:
- Your site is fast. (Don't have hundreds of sideboxes - focus on PRODUCT promotion).
- The ergonomics are clear and simple (navigational elements are easily understood)
- Products are easy to find (good category structure and naming conventions).
- Images are absolutely professional, clean and crisp - and large enough to see the product (or are enlargeable, as indeed ZC images can do)
- Product descriptions are clear, accurate, easy to read...
- The checkout process is clear and straightforward.