+1 for KPA with Kone. All others nice option but playin at home over the kabinet with bed room level makes me smile!
Then I got the Kabinet. Best of all worlds if you like a guitar amp in the room experience. Personally, I still use studio monitors most of the time but he Kabinet is amazing even at low volumes. As others have said, physics plays a bit part in low volume listening for two reasons - Equal Loudness Curves (often referred to as Fletcher Munsen effect) and the fact that you can still hear pick and string noise acoustically on top of the amplified sound.