I second Butsy: full range floorstander may offer you a real placement issue between imaging and bass response (room nodes and standing waves). With a sub, placement is way more flexible and you get the advantage of monitor imaging. $ for $, I would think monitor + sub is a better deal unless you start spending over $7-8k on large full range speakers IF AND ONLY IF both monitors and sub are well integrated (you need a friend and some patience). In the budget category, Martin Logan - even the Grotto ($750 used) is a sweet deal, then REL. If you do not have monitors yet and have $5,000 to spend for both (price new), combo ProAc 1SC and their new sub. Amazing.