Since you will not be using a sub, you must set the mains (those new 802D's) to "large" before you can set the sub to "off." Once this is done, the mains will ignore their crossover point (so it doesn't really matter what you set it to). If you do add a sub later, then 40Hz would probably be a good starting point for the 802D's, although I'd also experiment with 60Hz. I'd probably cross the HTM3S over at 60Hz (the -3dB point is 42Hz, so going up to 60Hz will make sure it starts to unload to the mains before it really starts to roll off). I'd also cross the rears over at 60Hz (-3dB point for them is 50Hz), and I might even tinker with an 80Hz crossover for them just to see how they sound that way.