I think the cleanest option would be to create add an event trigger upon login to bind() the additional profile data to the user object. The custom profile data from your profile plugin will then be available from the user object.
Also, and I have to say at this point this is untested: Try using;
<?php
$user = JFactory::getUser();
$profile = JUserHelper::getProfile($user->id);
var_dump($profile);
//each plugin adds its own object loaded with an array so you can access your fields like this
echo $profile->profile['address1'];
?>
From
ammonitenetworks.com/14-joomla/13-access...-joomla-user-profile
Hope it helps,
Gez
