Hello
Thank you for your kinds words.
We have considered changing the H1 tags however opinion on how these tags effect SEO seems to be pretty varied. You will find Googles Matt Cutts here saying multiple H1 tags (in moderation) won't effect your ranking..
https://www.youtube.com/watch?v=GIn5qJKU8VM, however I believe the opposite is true for Bing.
Regardless if you wish to convert your logo image from a H1 tag to an IMG you can follow these steps...
Locate the following in the templates header.php (../templates/[YourTemplate]/php/layouts/header.php)..
<h1 class="logo"> <a href="/index.php" title="<?php echo $siteName; ?>"><span>
<?php echo $siteName; ?>
</span></a> </h1>
And replace with…
<div class="logo"> <a href="/index.php" title="<?php echo $siteName; ?>"><span>
<?php if($this->params->get('logoimagefile') == '') : ?>
<img style="display: block;" src="/<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/logo.png" alt="Logo" />
<?php elseif($this->params->get('logoimagefile') != '') : ?>
<img style="display: block;" src="/<?php echo $this->baseurl ?>/<?php echo $logoimagefile; ?>" alt="Logo" />
<?php endif; ?>
</span></a> </div>
In your templates template.css (../templates/[YourTemplate]/css/template.css locate the following (approx. line 33)…
h1.logo {margin:0; padding:0;}
h1.logo a {display:block; position:relative; z-index:0; width:100%; background: url(../images/logo.png) 0 0 no-repeat; z-index:10;}
And replace with…
.logo a {display:block; position:relative; z-index:20;}
And finally in your templates styles.php (../templates/[YourTemplate]/php/styles.php) locate the following (approx line 73)…
h1.logo a {left:<?php echo ($logo_x); ?>px}
h1.logo a {top:<?php echo ($logo_y); ?>px}
<?php if($this->params->get('logoimagefile') == '') : ?>
h1.logo a {background: url(<?php echo $defaultlogoimage; ?>
no-repeat; z-index:1;}
<?php elseif($this->params->get('logoimagefile') != '') : ?>
h1.logo a {background: url(<?php echo $this->baseurl ?>/<?php echo $logoimagefile; ?>
no-repeat; z-index:1;}
<?php endif; ?>
And replace with…
.logo a {left:<?php echo ($logo_x); ?>px}
.logo a {top:<?php echo ($logo_y); ?>px}
Hope this helps.
Ciarán