Instead of hooking into admin_print_scripts only, you should hook into your specific page slug which is appended to admin_print_scripts-. (note trailing hyphen). The reference page you linked to shows this, but you seem to be omitting the $page concatenation to admin_print_scripts-.
eg:
$page = add_theme_page( 'Options', 'Options', 'edit_theme_options', 'options-panel', 'topf_admin_options_markup' );
add_action( "admin_print_scripts-$page", 'enqueue_my_admin_scripts' );
I’m using the slug $page returned from add_theme_page; you should provide your own slug. Scripts will only be loaded for your specific page and there is no need to check within your enqueue function.