The Hsu speakers do sound decent but be aware that they still sound like horns with a slight horn harshness. That doesn't mean that they sound bad, just that they aren't my taste in speakers. As for other suggestions:
Ascend CMT-340SE up front (
b-stock to save money) for about $800 shipped. Call and see if Dina will give you a 3.0 package discount on b-stock. Not fancy looking but they sound very good. They are rear ported and like the Hsu will need 6-10" of space behind them and some room around them. That's about the biggest speaker I'd want in a room that size but that's me. For that room I'd probably stick with the STF-2 just to stay in budget.
BTW Hsu doesn't always list all of their b-stock on their website and you could ask if there are any b-stock VTF-1 or VTF-2. It's a long shot but worth a call.