Ok, for a dual opposed HF box, I calculated it should be around 200lbs (1 1/2 sheets of MDF, 60lb drivers), and a DVC box would be around 130lbs (1 sheet MDF, 38lb drivers). 200lbs would be a giant pain to carry up and down stairs when I move (not that 130lbs would be fun either). So if I went with the HF's, they would have to be in individual boxes, or take the drivers out of the dual opposed box when I move it to save 60lbs.
How much power can the DVC's take? Parts express says 350W per coil RMS, 600W total. Dayton's website just says 350W RMS, 600W max. So how much can the whole sub take? If it's only 350W/sub, then 1200W/channel from the EP2500 seems like way overkill.
How would the DVC's sound compared to the HF's sound quality wise? Assuming I used winisd right, running 2000W to 4 HF's and 1400W to 4 DVC's, the HF's have 2-2.5 db more output and -3db is 6Hz lower. Seems pretty significant. The HF's look like higher quality subs too, it would be nice if they didn't need such a big box.