<?php
//to grab top10 toptalkers
foreach($tt_ranks as $talker => $rank)
{
    if( rank > 10 )
        break; //we've already got the top 10 -- bail outof the loop

    //do stuff here. 
    //to get the user's other stats, use $stats[$talker]
    //f.ex.:
    echo $rank . '. ' . $talker . ' - ' . $stats[$talker]['tt_words'] . ' words';
}