Canes, I think the 1250-5 vs the 1500-5 very much depends on whether you'd be planning to play the active LFRs full range. If you cut them off at 80Hz, the 1250 will work for your case even for party levels. But how can you possibly know until you try it? I suppose if you want the ultimate in flexibility/performance, the 1500 is the way to go.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated