Since it looks as though no affordable integrated SS amps are thus far testing well enough to receive a solid recommendation, which amps would you all recommend for >$1000? Any thoughts on where the sweet spot is from $300-1000? I have been told by folks at my local hifi shop that something like the Rega Brio is competitively good and that noticeable differences start at about $2k. Given that the fundamental science for signal amplification seems to have been solidified 50+ years ago, it is hard to figure where to start looking. Any thoughts? Thanks!