I currently have 2 HD DVR's (HR-21 and HR20) and one H24. The HR 21 is connected to my Panasonic VT20 3Dtv. Is there any reason that I would need to purchase a HR24 because of my 3Dtv? I have looked over the features and it just does not seem that it is worth the money because their is no difference from my HR21. I have the H24 and I really like it because it was small and it operates cooler.