Thomas, I have three phase coming into the house so I'll take the first step of running a dedicated 15 Amp cct off one of the quieter phases (you know what I mean, not pool pumps etc) for the audio equipment.
The only gripe I have about IBs is that they launch you on an upgrade path for the rest of your system.
Tell me about it! First, you have to define empty space for an enclosure you never knew you needed ... Then you have to fill that same volume with empty packaging. With each new purchase your Total Vas multiplier shrinks as fast as your bank balance. The empty boxes accumulate so rapidly that they suddenly collapse under their own gravity. The IB has now become the black hole of all subwoofers. Credit cards shrink noticeably as they are drawn inexorably down into the darkness. Finally remaining visible only as spiralling, empty packaging. Falling forever into the far future of your salary event horizon.