need advice on my store front page

[purplemartinart]

I am trying to improve my SEO of my site at http://purplemartins-r-us.com

and was wondering if I added informative text/content below the featured items if it would help?

 

I am worried that it will mussy or muddle up the front page and may start to get confusing for the customer.

But the SEO contributions, articles full of content are NOT helping. In a market that is not a huge market by any means, I still am showing up 100+ on google searches.

 

So would adding text (can I add a box?) in the center below featured products??? If so what file would I alter???

 

http://purplemartins-r-us.com

 

Thanks all