@unsound,
90 dB at 2.83 V 1/m into 4 ohms means current = 2.83/4 = 0.7075. Watts = current x voltage = 0.7075 x 2.83 = 2 watts. 90db at 2 watts, 93 at 4, 96 at 8, 99 at 16, 102 at 32. Regardless, the older I get the more I'm convinced that the way to go is to have a couple of systems. My den (I guess you'd call it) has my Thiel system, and my family room has my rock 'em sock 'em robots system. I'm guessing this is actually cheaper than having a single system that tries to do everything. I've got around 27k in both systems combined but components going all the way back to 2003. Less than 2k/year, not an extravagant hobby by any means.