Insert widget area for ads above content below header in main content column

Hi,

I’m trying to insert a widget to display Ads above the main content on my site (above post title and below header) on some of the main pages which include:

Home Page
Archive Page
Single Post Pages
Pages (except for main pages such as ‘contact-us’ etc)

Again I only want this widget to show up once on each page (at the top below the
header and above the first post title/content), and I only want it to show up in
the main content column (left side which is the bigger content area of a 2 column site).

I think I have successfully accomplished this but need some feedback to
make sure I did it right or if there is a better way to do it.

Below is the code that I have put into my child theme’s functions.php file:

//* Register before post title widget area
genesis_register_sidebar( array(
	'id'            => 'before-post-title',
	'name'          => __( 'before post title', 'eleven40' ),
	'description'   => __( 'This is a widget area that can be placed before the post titles and below the header on main pages', 'eleven40' ),
) );

//* Hook genesis before entry widget area before post title
add_action( 'genesis_before_entry', 'sp_before_post_title_widget' );
	function sp_before_post_title_widget() {
	global $wp_query;
	if ( is_singular( 'post' ) || is_page() && !is_page( 'contact-us' ) || ($wp_query->current_post == 0) && is_archive() || ($wp_query->current_post == 0) && is_home() )
		genesis_widget_area( 'before-post-title', array(
			'before' => '<div class="codeblocktop">Sponsored Links',
			'after' => '</div>',
	) );
}

This code has accomplished what I wanted it to, but I have some concerns that I would really appreciate help with…

1.) Is the code correct?

2.) Is there a cleaner piece of code that will accomplish the same thing?

3.) Is there a better way to do this?

Like I said… it’s working exactly how I want it to but just want to double check with folks who actually know what they’re doing and make sure that I did it right.

Please forgive me as I am new to WordPress and learning as I go. I would
appreciate any help you can give me. Thanks!

P.S. My Child Theme: eleven40 (genesis framework)