The DT 7001s put out good quality bass, but they don’t provide the visceral bass that people want for HT purpose. For that, you want a true subwoofer. If the $5K is meant to cover the L/R + sub, there are many fine options available. You may want to elaborate on the specific usage of your system. How big is your room (LxWxH)? If your room can handle it, 2.5/3-way bookshelf/monitor/floorstanders combined with stereo (dual) subs will put a big smile on your face. And in actuality these days, you can get a high-quality 5.2 setup for your $5k!