archive loop first post different

<?php // Check if there are any posts to display
                if ( have_posts() ) : ?>
                <h1 class="archive-title"><?php single_cat_title( '', true ); ?></h1>
        <?php if ( category_description() ) :  ?>
        <h5 class="slug-line"><?php echo category_description(); ?></h5>
        <?php endif; ?>
        <hr>

                    <?php while ( have_posts() ) : the_post(); ?>
                    <?php if( $wp_query->current_post == 0 && !is_paged() ) : //first post in loop// ?> <!--COLUMN 1-->
        <div id="column1">
            <h2 class="section-title">Latest Story</h2>

                    <div class="item">
                    <h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
                    <small><?php the_time('F jS, Y') ?></small>

                    <div class="entry">
                    <?php the_content(); ?>

                    <p class="postmetadata"><?php _e( 'Posted in' ); ?> <em><?php the_category( ', ' ); ?> on <?php the_time('F jS, Y') ?></em></p>
                    </div>
                    <div class="comments-template">
                        <?php comments_template();?>
                    </div>
                    </div>
        </div><!--column1-->

                    <?php else : //other posts in loop// ?>

        <div id="column2">
        <h2 class="section-title">More Stories</h2>

                <div class="item article-preview">
                <h3><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h3>
                <p class="date-stamp"><?php the_time('F jS, Y') ?></small></p>
                <?php if ( has_post_thumbnail()) : ?>

                        <?php the_post_thumbnail('thumbnail', array('class' => 'articlethumb')); ?>

                    <?php endif; ?>

                <div class="entry">

                <?php the_excerpt(); ?>

                <p class="postmetadata"><?php _e( 'Posted in' ); ?> <em><?php the_category( ', ' ); ?> on <?php the_time('F jS, Y') ?></em></p>
                </div>
                <div class="comments-template">
                    <?php comments_template();?>
                </div>
                </div>

                    <?php endif; //ends oter posts in loop// ?>

                    <?php endwhile; ?>

                    <div class="navigation">
                        <?php posts_nav_link(); ?>
                    </div>
                <?php else : ?>
            <p>Sorry - no posts found</p>
        <?php endif; ?>