Heh...audio buffs and overkill are like Bordeaux and cheese...they go so well together. 8-) A 25KVA ups would probably keep most homes lit up like an Xmas tree for quite a long time (again, the assumption is that you don't have things like your refrigerator or your central A/C on the ups)....probably at least an hour or two. And then if you want extended protection, it's relatively cheap to throw in a propane or diesel generator that kicks in when the UPS batteries are discharged more than X%.

Overkill? Probably. Expensive? For people that spend $10k+ on their stereo....probably not.

Cheers,